Not all people who seek solitude are lonely people maybe most of them. And to fill their loneliness is not only through art but maybe mostly.
There are many people who seek solitude for religious reasons as well, they're called hermits. But there are also hermits without religion.
Anyways, there are varieties of people we still don't know and we're ignorant about them.
If we see people seeking solitude who could not understand their fellow men or the world in general, maybe they're right because a humans are limited being.
Its better to be humble than being boastful and pride in achieving something for perfection that's impossible to happen.