Also, having worn glasses for so long I've gotten used to the built in "objects flying at my eye" protection they offer. My glasses have caught more than a few flying objects and/or children's fingers.
Then there's reality:
1) Something might go wrong
2) My eyes are unbelievably important to what i do for a living and how I entertain myself, I'm not sure I'd want to live without them
3) I don't like the idea of being concious while someone/thing is cutting on me, especially my eyes