Sometimes yes, sometimes no.

Some religious people are extremely rigorous with science and knowledge. Historically, a lot of major scientists and academics were religious in some manner. Many got into science to "understand the heavens" so to speak.

And, for many religious people who actually study religion(which is academic in it's own right), they understand where myth, legend, and codified religious beliefs are in the texts and follow them accordingly.

For example, most Christian theologists know that creation myths exist to explain the world to early societies and should be taken with a pile of salt, so Genesis is seen less as "historical" and more "metaphorical" or just culturally relevant.