How to accept that being successful in school, uni then work can still and (is more likely to) lead to not having friends or a relationship and that happens to a lot of smart people?

Usually being good at school, uni and then career helps you build an identity of being smart and that could shatter if that person (doesn’t happen to all smart folk) has a hard time in building connections with people. It happens to me – I am 28, have a good education, job and am fit yet I find it hard to talk to people outside of my field of expertise. This is the reason I never had a girlfriend.

I see many men who are less educated than me, are less fit and make less money have relationships.
I have posted here before and have been told in the comments this is because I don’t have a personality and those men have one. Yet I can’t build a personality that easily. Will this lead to me being a loner forever.

How to accept that no matter how much money I make or how much better I get career or body wise I might still be unsuccessful because my social life is lacking yet people who are not OK in their career will have a great life because they will be fulfilled outside it.