With age comes wisdom. :p When a 45lb bow gets passthru's on deer like a 55lb bow, after a while some guys figure out it's more enjoyable to shoot 45. And for hunting, when you may have to hold for seconds, it's the better option.
And after you've gone thru shoulder surgery, you come to the conclusion that the passthru's you got with 40lbs worked well and that 35lbs is about all you need to kill a deer.
Remember, for some of us it's not how far you can shoot, it's how close can you get? At 15 yards tops, you can kill a whitetail with very light weights and good arrow placement, year after year.
The past few years before my surgery, I didn't shoot a bow over 42lbs. I got passthru's on every deer and most died in sight and the others died in less than 100 yards.