" I'n sure humans will still be fallible on the other side of the revolution but why is that a problem in itself? "

It is THE problem...the big one. With any system of economics, government, society...in any ideology there will be those who, driven by an unfathomable desire for power, will subvert the whole process to their tyrannical ends. It has happened all through history, it is still happening...i hope at some point it will stop. Until then, we're screwed when it comes to equality, freedom and democracy.