Forum:Possible Timeline error

I noticed an interesting coincidence. The game says the Protheans vanished c.50,000 years ago. I also says Asari live on average 1000 years. This causes me to see two possible problems. First, if the Asari developed after the Prothean downfall then that means their species only took roughly 50 generations to become one of the galactic leaders, this seems strange even with their long lives. If they started development before downfall, then does that mean the...SPOILERS...

...Reapers avoided them, saving them for later perhaps? This also means the Reapers avoided humans too. WHile writing this I came to belive that the Reapers only have selective genocidal tendencies. Anybody agree or disagree? Muddybudd