This reminds me of a classroom debate from school:
If you, the day before a major surgery, saw your doctor reading through a medical textbook on the topic of your surgery, would you be more or less confident in their abilities?
Some said they wouldn’t trust the doctor, as they held some notion that the doctor should just know these by virtue of their being a doctor. That if they don’t it is a sign of their ill preparedness and lack of ability.
Others had no such issues, that it is legitimate and good that a doctor would be adequately preparing for the surgery by studying.
If you think of things more towards the former, and you end up as a “last minute, read a book” type, as I tend to be, you might wind up feeling like an imposter.