I don't see an edit button for my comment anymore so I'm just going to add the following thought: remember that no one is immune to disability. One small slip-and-fall, one other careless driver on the road with you, one infection, etc is all it takes and suddenly you've got to struggle through life to make anything work. That is why this is important: it could be you or anyone you know, and happen at any time. Even if you feel invincible.