Everyone's gravel is different. I ride a lot of gravel, because that's what I live on, and have the most access to. I don't value knobs around me, cause they'd never be tall enough to hit anything firm to dig into. Similarly, I don't "corner" like I do when riding on pavement. I've ridden Rene Herse Bon Jon's, measuring out to 39 for the past few years, and they have been just fine when my roads are "decent." When they aren't, 2.1 isn't even hardly enough float, so I just use my fat bike for quite a bit of the year gravel riding. Just too much sand/silt/loose material, that's far too deep most of the time.
This isn't even wet. It's just got nothing firm for a foot down, and all the loose crap they pile up lets a heavy vehicle just sink down like this. The crowns heaved something terrible with this management.