You make a good point and there is nothing wrong with healthy skepticism, but you would keep in mind that this is a book from the 1998 by a credentialed and respected author.

The book does go into much further detail on the different styles it defines. And it utilizes extensive field work which started in 1986 which includes behavioral observations, parent / teacher questionnaires, and medical data. This is the psychologists summary of what they think is the best parenting styles at the time with the data they had.

I would recommend if you’re interested in the subject and wish to critique it as it to read the book yourself.

I’ve just finished it and would love to see some opposing views that make sense.