I think there's a certain class of people who find exercise inherently interesting, and others who don't. VR is for the latter.

(I've gone to the gym ~7 years daily, I now do some supplement stuff also in VR, and I've noticed an improvement since adding VR. I think it's because VR workouts impose structure that the rest of my routine lacks. There are ways I could add more structure to my regular routine of course, but I don't want to expend the additional mental energy that way, especially in an ongoing basis.)