Those two cycles are all the evidence we have.
That is my point as to why we have no reason of accepting what they are saying at face value.
There's no other way of seeing what happened in previous cycles.
Exactly why you shouldnt be so quick to judge a race that harvests a galaxy at face value.
We HAVE to work with the evidence given to us, and that evidence points towards the Reaper's being right about the cycle or organics and synthetics.
WAT? The very small sample size we have is ENOUGH to you, to rationalize that exterminating every advanced civilization in the galaxy every 50k years is the RIGHT thing to do? Really?
It doesn't matter that the Protheans were winning their war. They would eventually create even more advanced AI, which would eventually complete the task of wiping out organics.
According to the things wiping them all out...
The Reapers wouldn't continue the cycle if they hadn't seen evidence of the cycle repeating itself over and over and over again. Why would they?
Who knows why! That is entierly my point. You have no idea what their motivations are beyond what they feed you and you are accepting it on face value that it is cool be a galactic genocidal gardner, because you believe they were being honest, and you just cant think of any other reason why these things do what they do.... Am I getting this right?