“Why go to gym when you can buy the equipment and set up one in your personal room?”
That sort of argument is often made, especially by equipment manufacturers. This is pure sales promotion, which ignores the motivational part of training. Yes, a handful of world champions have trained at their own garage gyms and competed at the highest level in different sports.
But, then, they were people with tremendous drive, which unlocked their genetic potential.
The point in going to a gym is that you are pepped up by the positive atmosphere, the hard training you see and the vibrations you get in the weight room. Working out among people who train regularly maintains the excitement, energises the body and elicits better response. Unless you have a world champion training with you at your home gym, it’s hard to keep up the motivation.