Can’t you be both deaf and healthy? Or missing a leg and healthy? I don’t see how “disabled” implies “not otherwise healthy”.

I often run into people who are deaf, or an amputee, or have type 1 diabetes, etc, but I rarely come across someone that (to my knowledge) has a substantial illness. But I live in a city where I very, very rarely run into someone much over 40 (at that point they are likely to have been married and had children, and the thing nearly everyone does here is move into the suburbs once they’re married with children).

I suspect that where you live makes a huge impact on whether or not you’re surrounded by unhealthy/ill people.