I'm undecided on this point. There are still sales people who are doing it, you just have to do it right.
George Sairoglou has made this quite clear in his daily videos that get thousands of views.
https://www.linkedin.com/in/george-sairoglou-b58b2343/detail/recent-activity/
I don't think he's a huge exception either, he's just willing to put in the time and energy.
I've seen similar on Facebook where a sales person builds their own network of "let me help you find your next car" - they're still successful with no paid advertising. Dealers would be lucky to have these guys.