Some time ago, one of my co-workers told me, as if he is doing me a big favor, that "you need to have your own opinions." Yeah, ok. I suppose he gets to judge whether an opinion is my 'own'?
This reminds me of a particular self-aggrandizing strand of make-believe: everything that is not one's own is bad.
That is to say, people conflate ownership and actual value, and give free pass to aggressively ignorant attitudes: "So long as the opinions are my own, who cares about the truth?"