You ever see some people that just do calesthetics at the gym most of the time? Whats the point?

Maybe they don't have the motivation at home, they need the gym.
It's their money 🤷‍♀️

Im the opposite, I am too easily distracted and work out better on my own.

people just need to be around other people.. human nature.

They might prefer the space or atmosphere at the gym. Some people live in tiny apartments.
The gym will have certain bars and things to be helpful with that as well but yeah you are right.