The same is true in every realm: taste matters. But that's not a reason to blanket-discourage expression.

(I do wonder if the people here who hate it are picturing students who blindly highlight pages, and the people who like it are remembering the times they've seen a few pencilled sentences in margins of an old book)

I once picked up an old copy of Bartlett’s Quotations and found that the prior highlighting owner found it nearly 100% profound.