I think the main reason is about social interaction. We work a lot and can't choose our colleagues, so making friends with them can be hard. But, if we do an activity in our free time, we can meet people who share our interests and possibly make better friendships.

Everyone has a hobby they love besides work, and doing these activities is a way to use this energy. A lot of people are creative and have skills like painting and playing music, but maybe they can't earn a living from it. So, they do it in their free time instead.

It's a way to have fun and enjoy ourselves. When we're free, it's not good to just sit and look at social media. Most people prefer to go out, meet others, and do something together. It's a break from work stress and responsibilities, but mainly it's to have fun and relax.