Not true. I know someone who last I spoke was in graduate level cell biology and did lab work on brains at a top university, yet did not believe in evolution. In fact, I recall her citing her personal awe of the brain etc as evidence of intelligent design.

Don't underestimate humans' abilities to selectively ignore evidence, the immense pressure of their peers, parents, and friends who have similar beliefs, and the underlying fear of death that motivates people to believe in an afterlife (and all the various attached beliefs from there) to allow compartmentalization of beliefs from knowledge.