Is there a benefit to being well-informed? Sometimes, it depends.
A maxillofacial surgeon who is well-informed beyond the point of what is required to earn their title has, by necessity, divested time from their specialization.
I don’t care if my surgeon is well-informed; that’s a GP’s job. A specialist’s job is to be myopically hyper-informed. That’s what the special part of specialization means—knowledge or skill that is greater or better than usual.
P.S. The scarcity of that knowledge and skill is also why they get paid more, if that’s something you care about.