FWIW, sweat is solved problem; there's plenty of silicone covers [1], sweat bands, etc. And the parent also mentioned of wearing glasses, but prescription lenses are widely available (I use these ones [3]).
I'm just puzzled by your comment of "doesn't mirror real world applications of your body"; as if boxing, squats and cardio in general weren't "real world" :)
[1] https://us.vrcover.com/collections/silicone-covers
[2] https://www.facebook.com/groups/getsupernatural/
[3] https://www.framesdirect.com/virtuclear-lens-inserts-for-ocu...