I’m not surprised sadly - I have a PhD in chemistry and then continued to a postdoc and teaching before heading elsewhere. During my undergraduate there was a woman on the course who was very good and very competent but was also evangelical to the point of believing in a young Earth. To her, concepts such as half-lives were just lies that needed to be learnt.

Normally that has been flushed out by the time of doing a PhD, but if not it really should be.