Could it be, that a person can be boring, even though they do things? Is it the lack of the ability to express oneself? Lack of focus? [I'd Rather Get To Know You Than Small Talk]

Lack of popularity. If you don't fit in even the most social person will not be included. Has nothing to do with ability nor way of communicating.

In fact some of the least able are quite popular. While the ones with the most abilities rarely are popular.

Knew a gal that had no job, wasn't pretty, could hardly speak good english, in fact she was quite insane. Which was why she was quite popular.