They’re paid by the job, not by the hour.

IOW they get paid a fee for the visit, a fee for any tests, etc.

Thank modern insurance for that.

They do not get paid any extra to have a conversation with you or to spend actual time with you to discuss whatever issues you are facing. I think the caveat is more that the GP/PCP is more likely to speed by you as they’ve got 20 more patients to see that day and a specialist will probably spend more time with you because they’re only trying to work on one issue rather than deal with weird pains, blood tests, talk to you about your weight, etc…