Stupid is as stupid does.
While all legally blind means is that vision is not correctable up to a certain standard, that is still a great reason to not go blazing off on an ATV. It’s hard enough to see every little hole with good vision.
And what’s the deal about not having a license? I didn’t know anyone needed a license to offroad an ATV.
Far as I know you don't unless operating it on roads. I don't think that back country unimproved roads count. Might be a State by State thing though.
Definitely don't need one on private property though, which this sounds like actually to place on.