John (whoops!), are people getting your point? It seems to me that a lot of the responses are not getting to the heart of the discussion you started.
As for me, I like to push myself. I could shoot my 48# bow literally all day long, with practically no muscle fatigue. I don't like the fact that it feels too easy. I also have begun shooting 69# limbs on my recurve, which -- I will admit -- were tough to shoot when I first got them. So I started a pretty dedicated workout routine: Every day I do 3 sets of 10 draws (10x right-handed, 10x left-handed), holding for 2-3 seconds at each draw.
By the way, I'm 6'0", about 195 pounds.
Now I can draw that heavy bow to 31", hold it for a count to 10 if I want to, and still shoot a controlled shot. I don't ever hold that long in real life, but you get the point.
It is a natural tendency for a person to take the path of least resistance. The same for animals -- you find fish escaping current by hiding behind rocks, and we know that deer prefer to walk on clear trails instead of bush-whacking. Let's face it: We all prefer walking a trail up a mountain instead of fighting through alders all the way. But I like to hear about people who worked hard to achieve something, instead of just settling for something because "it will work".
Isn't it the guys who are willing to get off the beaten path (the easier road) who find pockets of game that were not found by the less-committed hunter?
Certainly, there are people who are older, or who have health problems or physical limitations, who are GLAD that a 40# bow will get the job done with that sharp, well-placed arrow. But even if I get to that point someday, I hope I will want to shoot 46# if I can work up to it, instead of 40#.
I don't think Nathan wanted to start a discussion about bow weight. I think he was talking about pushing ourselves to strive for excellence, instead of settling for mediocrity. And we must remember... one man's excellence (my shooting a 69# bow, for example) is another's mediocrity (bcause the guy who shoots 85# bows considers mine a lightweight).