You are looking at the pointy end, people on roids and HGH that lift 8 hours a day.
Compare to someone that lifts for 1 hour 3x a week. He will have stronger bones and joints than either a desk potatoe (no stress = no buildup) or the tradesmen (too much stress without rest = failure)
Compare to someone that lifts for 1 hour 3x a week. He will have stronger bones and joints than either a desk potatoe (no stress = no buildup) or the tradesmen (too much stress without rest = failure)