ratiocinator
Lightly seared on the reality grill.
As usual the problem is that reality is infinitely more complex than humans perceive it to be.
It might well be, but that doesn't mean that we should dismiss evidence based, well tested theories.
If it were as simple as we believe then we could make predictions but nobody can.
We're very good at making predictions in any number of fields and we can, to an extent, make predictions from the theory of evolution. It can tell us the sorts of things we should find, for example, in genetics and the fossil record, and what we wouldn't expect to find. What it can't do is tell us exactly how a population will evolve because that depends, to a certain extent, on random variations.