I don't understand how the philosophy of evolution could be accorded the word "theory" when it comes to science. It is no such thing.
Perhaps because you slept through your science classes.
Morals. That's the answer to understanding this whole picture. Most die hard evolutionists know that at root, ToE, gives a free pass for all 'immoral' acts, especially sexual ones. How? By using 'science' to prove via ToE, that the origin of morals themselves must be mythical. The 'Origin of the Species' should be retitled to the 'Origin of the Amoralists'.
It is what you never see them yelling about that gives away what they support. Evolutions never scream 'Abortion is wrong' in any significant numbers. In fact, I've never heard of one confirmed atheistic evolutionist attack abortion on demand.