Sustained high RPMs

Hey guys got another question for y’all.
I’m about to get an outlander 800 and I’ve been doing some research and part of that leads me to a lot of videos of people muddling. In these videos these people (what sounds like) are at full throttle for sustained periods of time to get through a mud hole or whatever. Are these four wheelers designed for this? Or do they just not care? I come from a motocross back ground and you don’t normally hit the rev limiter for any period of time. So when I see it I cringe and expect for the four wheeler to just blow up. What do you guys think?