I'll watch, thanks.
The whole "flame of glory" model sounds really awesome when you're a healthy person, but you'll find that it tends to break down pretty catastrophically about two seconds after the flame goes out.
It's one thing to be a spectator by choice, but when you're forced into the role, it's a completely different story.
P.S. That said, thank you for reminding us of the question, "who wants to live forever" - it is perhaps the single most epic line from the 1980 film Flash Gordon.
Those who want to poke maximum fun at couch potatoes always seem to pick American football for their examples. That's because civilians don't actually play American football, so there's relatively little danger of an embarrassing counterexample popping up. (Actually, plenty of teenagers play American football, but perhaps teenagers know better than to try to argue with curmudgeonly trolls on the Internet.) It's rarer to hear people try to make fun of Americans for not playing basketball or, god help us, golf... because in any city in America a golf course or a pickup basketball game is probably no more than ten minutes away. I know a bunch of middle-aged adults who play basketball. I know this because they occasionally turn up with basketball injuries. ;)
Incidentally, I only just noticed an incredible folly at the heart of this article: If you sample teenagers, you'll find a much larger percentage of them playing sports. But a smaller and smaller percentage of the American population is under 25. Is it really such a terrible thing that so few 55-year-olds play contact sports? Aren't our emergency rooms busy enough as it is?
When you think about it even more casually, going down to the park with a few friends, rugby and american football are both hard to replicate. Sure you could pretend to both be quarterbacks and pass the ball back and forward but it's really nothing like the actual sport. Same with rugby which is mostly backwards passes.
Taking the American sports angle you can see why it's much more common to seeing friends playing basketball casually as getting a few friends together you can mostly replicate the game.
I used to play it often. But I find I can get as much enjoyment watching pros, who completely dominates the game, play against each other.
The difference is watching doesn't involved the mental effort that playing does. After 8hrs of design/programming, the last thing I want to do is think more.
I imagine the required effort is the same for grabbing a beer and watching football on TV vs going outside and playing it.
A) you've seen a football player. I wouldnt want to be hit by one of those guys.
B) you've understood the beauty of american football. Imagine a sport which combines the ferocity of grappling along with the strategy of chess. Its just an awesome sport to watch and comprehend.