[snowwrestler]

Natural selection is universal and undirected, so it is meaningless to wonder “why” it was “content to evolve” anything.

This sort of determinism has been a problem for Dawkins going back to the late chapters of The Selfish Gene.

[energy123]

"why" in this context is not about human intent, it's colloquial shorthand for "what is the fitness advantage if you can make intelligence without it?"