And it's not just random people in that community who believe in myths. It often includes people teaching the topic at universities.

It's not like that's different in a science like proper biology. You have always some issues that people care deeply enough to read the primary sources and some issues that are just fun to talk about and where myths get passed around.

There are scientistis like Feymann who don't simply believe others that they should brush their teeth but few people care about primary sources on that level.

To verify that, I would have to read the book again, list the specific claims

The main problem with just reading the book is that it simply presents the viewpoint of one person and as gjm suggests a person with an agenda. A book has no dynamic mechanism for checking-and-balancing itself.

Skeptics has a mechanism where multiple people look at answers and vote on them. It's not perfect but it's a better to form my opinion than reading an opinionated book by one side of a conflict.