VRR is also potentially a power saving technique, the computer only has to refresh at full speed when content changes on the screen.Except for the 10s or 100s of millions of us who aren't gamers or at least aren't PC gamers.
It could also (in future) fix frame pacing in video playback - though to this point all video players for Mac that I know of dont bother modifying your refresh rate.
I have a pair of 144hz VRR displays and they provide barely any advantage on a Mac - it cant even drive them over 100Hz.