It won’t happen only because humans create those systems and their brain processing power is not enough to calculate all interactions and. as a consequence, imbalances in a system.
So, to say it shortly, perfect balance is perfectly possible but humans just didn’t evolve enough to reach it, doesn’t mean they shouldn’t keep trying. Those who disagree with this can go back to their comfortable apartments in Stone Age caves and avoid bothering those who want to evolve in future
Even caveman could figure out that when something already sucks beating it up wont help it.