Yeah, so you could easily say we evolved to, or our brains evolved to... And so on

Yeah I dunno about design as much as iterative adaptations over incomprehensibly large periods of time.

Evolution did as much design as my socks design themselves to stay in their drawer. Evolution doesn't design, it works with what it has and nothing else. It doesn't even optimize because optimization requires choosing between options with intent. Evolution has zero intentions. Evolution creates un-"optimized" things that go extinct all the time, but it's not because it "failed" at designing because that implies it "tried" to design, but because it's not a designer, it can't design. No design made fish have legs. No design gave elephants their tusks and no design gave flies their wings. Evolution won't 'design' new vertebrae segments, but they still might happen---it just won't be because of any design.