I’m worried that I’m getting pedantic here, and I don’t want to be."What's more fun? Driving a slow car fast, or a fast car slow?"
(This came up in a discussion on what is adequate horsepower for a daily driver.) I think the same may apply here. It's the challenge of taking a vehicle that isn't quite up to the task and seeing if you can find a way to work it out. For some, that might be more fun than taking a highly specialized and modified vehicle through the same trail with ease.
Any trail can likely be run with a stock LR4 if you’re willing to build enough rock ramps, remove enough obstacles, bypass enough sections, winch enough, etc. My point is that at some point not only does it become absurd (“That paving machine and dynamite I had go before me really helped out a lot!”), but it starts to impact others in ways you might not know. Environmental groups have has success shutting down trails because too much oil or fuel was spilled when people opened themselves up on an obstacle because they didn’t have enough skid plating.
I never took my Unimog on the Rubicon, not because I didn’t think it would make it over obstacles (definitely would, easily) but because it is too tall to do it without damaging trees or the trail. Horses for courses. And it’s great to challenge yourself as long as you’re willing to back away before you make it somebody else’s problem, too.