My point is... If you have enough foodstore for X% of the population to make it through the 5-10 year period of crop failure, but can't do that if you try to feed 100% of the people what do you do?

I choose the 10% and continuity of civilization over 100% and complete destruction of society. And if I'm in the 90% .... I'll be pissed, but what needs to be done must be done.

In WW2 sailors sealed themselves up below the waterline to save the ship at certain doom to themselves.

The universe is an ugly place... But to see the light of humanity possibly extinguished is a worse prospect for me personally.