- some "juniors" read the book and take it as any other general book about programming: some things are good, some things are bad, other things are "meh". These "juniors" are quite practical people and tend not to get influenced by "tech celebrities" that much. These are good "juniors" (I wouldn't call them juniors, though)

- other "juniors" take the book as if it were their bible. They do everything the book says and don't stop and think by themselves. The usual excuse is: "Uncle Bob, Robert Martin, DHH, etc. they all are top notch tech people, I follow them without doubt". These, imho, are "bad" juniors... and, to be honest, it's not about tech at all, these kind of people are like this in every other aspect of their lives (e.g., politics). So, I don't care much about them because it's difficult for them to change this perspective on life.

To summarize: programming books written by "tech celebrities" can cause as much harm as good. Depends on who's reading the books.