Bioware tells us about our need for exploration and whatnot. That's what I base my beliefs on.
I agree, from the trailer and everything we've seen so far, it's very possible that BioWare will go the route of "we go because we can". This may very well be the case. Personally, I hope there is more to it because even in the ME universe as shown so far, mankind (and in fact all the races in the Milky Way that we know) follow very much the same patterns as we do today. Just read the descriptions of colony worlds in the Galaxy Map and you'll see that for all of them, there are sociopolitical, strategic or economic reasons for the state of their development.
I always like this approach because it is a "realistic" scenario (within the universe of course). For a project as massive (and central to the plot) as the trip to Andromeda, I'd hope they come up with a very good backstory.
At least the fact that they want to dedicate an entire novel to it bodes well, IMO. I am also curious to see what they come up with in the end.
If Reapers are an added cause then so what? We are still curious as to what's out there and we know Andromeda is out there. Exploration is a large chunk of why we do things. If we are going to Mars because of resources or Overpopulation than whatever. But I want to explore that place. You can patronize and criticise me all you want, I'm just going off what bio has been saying. What about explorers who explore the Amazon or the deep ocean, many of the people going to Andromeda are probably no different. They volunteered to go. They're curious and despite its "secret" motive they believe they're on an expedition to colonize and explore. And that's what they are gonna do. You have to think about colonising a galaxy in a different context compared to colonising something like a continent or a single planet.
Yes, lot's of individuals have an explorer's spirit. I dare say, I am one myself and I made my life choices accordingly. But as someone who is constantly trying to secure funding for research without an immediate tangible benefit, let me tell you it is dam hard (I wish it weren't, would make my life a lot easier) and the bigger and more expensive the project, the more tangible profit investors want to see, no matter if that's governments, businesses or other organizations. There may be individual philanthropists that sponsor truly abstract research but they are usually far and few between and I think having something like the Ark program financed by one or two people would simply be too much of a stretch (hope it's not frigging TIM
).
And of course, I also want to explore Andromeda. I just wouldn't want the entire experience of playing the game and going forth and exploring being based on a premise that I deem completely implausible (both in the real world and in the ME universe as we know it). That's the one thing that could ruin it for me even if the rest of the game turns out great. So I am just hoping that BW will give us a background to this entire setting that doesn't make me cringe all the time at least.



