The Mankind/Taker Hell in a Cell was a great match, I agree, but I would rather not see anyone take that type of abuse in a match. There is a limit to how far they should go to entertain and going off the cage like that is too much. The fall through the cage was an accident, sure, but the other one sure wasn't.
How many other guys have we seen doing stuff like that over the years since that didn't have to? Look at AJ Styles... TNA won't put him at the top, where he belongs, and he's finally tired of that so much that rather than have the great matches he is capable of, he's dropping off three story scaffolds and flipping off a cage to get attention. That's the influence Mick Foley has had. Great worker, great style for him, but IMO it led directly to so many poor imitations and completely unnecessary risks.