The parent comment said "Tesla doesn't believe in PR". It's clear that Tesla does in fact believe in PR judging by all of Elon's related activities, they just do it differently than other companies.

Also, look at website content like this: https://www.tesla.com/about

That is PR, regardless of whether you want to call the people doing it "PR" or not.

Elon believes in doing his own PR, but Tesla does not, simple as that. If I'm to believe that Tesla does believe in PR then, as I mentioned in response to another user, I'd wager they'd be doing a lot more to improve their image given how much of a negative impact Elon's poor attempts at shaping public discourse via Twitter has had on Tesla lately, where their stock is at, etc.

An "about" page is bog standard stuff and a pretty paltry effort in the grand scheme of the things a PR department at a company the size of Tesla would otherwise traditionally be doing. It's like, yes, technically that's a form of PR, sure, but it ain't much.