I've been thinking about joining a gym lately. My upper body workout is 10x more intense than my leg workout, which will never give me great results. Maybe I'll join a gym so I can do squats and never have to worry about setting up equipment such as adjusting dumbbells, weighting chairs to do dips, balancing a heavy barbell on my bench to do shrugs, going outside in the cold weather to do certain exercises, etc.
It's not because I can, but because you couldn't if you tried.