I'm not sure if McMichael was at the roast fundraiser thing (I don't think so, but don't know). But I'm not aware of him being advertised for the event near La Crosse. Flair is booked, as well as former Green Bay Packer Gilbert Brown (it's part of an annual thing he does at a campground), but the Mongo stuff has been advertised as a fundraiser, not that they'll necessarily be wheeling his hospital bed out to ringside.
Alkeiper's made some good points here as well. When it's more physical than mental, a consideration for human pride is necessary. Very easy to say from afar that all sick, injured, etc people should just be shelved up somewhere. But when the brain is still active and functioning, people remain interested in doing as much of the things as they used to do...even if that just means being physically at events, so they can see other faces, which might be more important to them than other peoples' opinions on how much different they look due to a condition.