Friends and socialising are optional, not necessities
I think we've massively exaggerated how necessary friendship and socialising are. We're constantly told that humans are “social creatures” and that everyone needs meaningful connections, but I don't think that automatically means everyone needs friends. Some people genuinely enjoy being alone and don't experience the lack of friendship as a problem at all.
I can understand why people would find that difficult to believe because loneliness is usually treated as something everyone eventually experiences. But what if you simply don't want what you're supposedly “missing”? If someone can spend days alone, enjoy their own company and never sit there desperately wishing someone would text them, I'm not convinced it's accurate to tell them they're secretly lonely.
I also think we confuse being alone with feeling lonely. They're not the same thing. Someone can have no friends and feel completely content, while someone surrounded by people can feel incredibly lonely. The number of people around you doesn't determine whether your life feels fulfilling.
And honestly, friendship comes with costs that people rarely talk about. Time, money, constant messages, making plans, maintaining relationships, dealing with disagreements and sometimes feeling obligated to do things you don't actually want to do. If someone doesn't get enough value from friendship to justify those costs, why should they be pressured into having it?
I'm not saying friendship is bad or that people who love socialising are doing something wrong. If friendship makes your life better, absolutely have friends. I'm saying it should be optional. You shouldn't have to prove that you're happy without friends, and you shouldn't automatically be considered lonely, weird or unhappy simply because you don't want them. Maybe some people genuinely don't need friendship in the way others