Sure, it's all possible, but evolution isn't an optimum-finding strategy; it's just a "good enough to be better than the last one". And, it's random, so even if a "6" on a dice roll is better than a "5", it's still possible to roll 1 through 5 ten-billion times in a row. And even if I do roll a 6, it's possible no one would see it, or I die immediately afterwords and can't take whatever advantage such a roll would invoke.

So the question of "Why didn't evolution come up with this?" is, to me, somewhat nonsensical.

But reasonable people disagree, and I'm no expert.