I wouldn't go so far as to say he's good. When it comes to white belts, you don't exactly bring your A-game against them. You have to play around with them, try your silliest moves, and control the pace. If you watch Lex fight him, you might see that Zuck can only work techniques because Lex gives him some space to try. The thing is that Zuck is showing the kind of competency you can expect of a white belt in general. He's not fighting like a celebrity, he's part of the crew, part of the ship. And I think you can expect a BJJ practitioner, in general, to beat the divorced as a state of mind Elon Musk in a 1 on 1.

Besides that, yeah, you're exactly right. At the end of the day, grappling, while being very human and ubiquitous with every culture ever, is very funny. If you want to watch a really funny fight (or at least the theatrics around it), might I suggest Craig Jones vs Gabi Garcia (https://www.youtube.com/watch?v=HID-Xi8hOUw). It's only kind of problematic because Craig's whole mission was to get women athletes paid.