“Man made” doesn’t generally mean man made though, for mountain bikers, it means something complicated. Sweeping off a line and removing wee hazards is man-made but people don’t think of it like that, or old walker’s paths. But big stacks of sandbags for a jump, definitely manmade.
The problem I have with the big built features is that as soon as they exist, it’s a trick contest, Gee Atherton could place second not so long ago with a ridiculous technical line and speed, now he’d get 50 points. And that’s fine, it’s just not the bit I loved most of rampage, you can do a big jump anywhere but those ridiculous “this is just a cliff with a skid down it” lines were so special. There’s still a good bit of that of course but you can’t win it without a bag of tricks and a line that can use them.