Aesthetics in a story, even more so in a visual medium, are used to send messages, and actually can't avoid sending them.
Reaperization is an idea. It's horrible to a normal human but it's about "saving" for the Reapers. Not a problem so far - but consider how that idea is realized in pictures: Reaper minions are gross distortions of the bodies of various species. The Reaperization process isn't clinically neutral, but full of unnecessary suffering, presented in a way that's grossly offensive to our aesthetic sensibilities as well as our moral sensibilities. On the storytelling level, that sends a strong message that you're not supposed to see the Reapers as anything but "evil abominations". You can rationalize your way around that, but the problem of this "abomination aesthetic" remains.
If the Reaperization process were more clinically neutral, the story would send the message that it's open to interpretation, that a more neutral viewpoint may be valid, and that the Reapers' viewpoint is worth taking into consideration even as you do your utmost to stop them. Such a message would naturally lead to different ways to deal with the threat. With the abomination aesthetic, the most natural reponse is annihilation. I appreciate we got the choices that we have, and I've used them, but considering the Reapers' viewpoint is against everything the 2.9 games before the ending screamed into our ears. Personally, I could work with it because I hate being screamed at and I have particular dislike for this abomination aesthetic, so I was motivated to ignore it. But I fully expected the ending to be complete annihilation for the Reapers, because of the way they were presented beyond what they were doing.
Of course, I understand your point, but even with sending these messages and pictures, can people not be allowed to take a different look? To look beyond this message aesthetics send? I know the Reapers are doing bad stuff, and create horrible abominations, are ruthless in order to achieve their goals etc., we are made well aware of this after all. But is it wrong to try to see the logic behind them? Why they do what they do?
The aesthetic point after all only matters to us organics again, it evokes a reaction in us, not in the Reapers.
And just because the game screams at us "Reapers are the bad guys! You must hate them!", I like to see both sides. It's a game, and as the player I want to understand as much as possible from both factions.
I have no interest in understanding a horrid monstrosity that is killing everyone.
Oh, I know all too well. Got the message the last time 
Right; but when the Reapers themselves show absolutely zero interest (or maybe they lack the ability) to see things our way, I'm not going to go out of my way to see their way. In fact, when this comes up during the end conversation, we get the totally profound answer --And I quote: "No, you can't"
Even if the Legion statement Monica found (Kudos to that, I've never seen that one before!) is true and really means that the reapers are preserving a (shallow copy of) their harvest victims; The original individual is dead. What's even worse -The entire civilisation is dead! There is literally no one and nearly nothing left after the 'preserving' harvest. Only whatever it is that's in a Reapershell, and that is obviously not a continuation of the original civilization. If it were, the Reapers would be different, they would behave different from another.
As I said, that's fine. I stated that it's in my personal interest to take a look at both sides, everyone can choose that for themselves of course. But it was a post to show there are two different worlds colliding with each other with neither side understanding the other. And it's just a fact the Reapers see their motivations as good, whether you agree with them or not. I could also simply just say, Reapers and organics are both wrong and right, it totally depends on the perspective you put yourself into. And I absolutely agree that they lack the ability to see things from our side. I don't think they're capable of that. Have you read Karpyshyn's novels, Retribution specifically? I took away from it that Reapers are just the way they are, they don't understand that we don't want to be immortal/preserved, so of course they don't see what they do as evil. Their ultimate goal is to preserve knowledge, but they also don't refrain from ruthless actions to achieve it, and they don't even see that what they do is wrong because our morals differ fundamentally.
Yeah, but since the Reapers believe in the Synthetic-Organic conflict*, the outcomes would be:
1. Let the civilisation die (let's just assume Synthetics do in fact destroy all organics in the future), no preservation takes place. The civilisation is lost in the same way as an individual dying from natural causes is lost.
2. Harvest them before the civilisation is lost forever. To them this is of course the better solution. They don't see why we wouldn't want to be turned into goo.
*Of course, if you don't believe in the conflict, that point is moot, but that's what we're presented with in the game from the Catalyst's side.