Overstimulation is poison--so part of getting good benefits from being alone in solitude is to avoid overstimulation. For most of us, overstimulation comes from being slaves to electronic media, social media. Don't get me wrong, I'm not condemning the internet. After all, the internet makes communication much better than without. But most people spend so much time on the internet that it becomes extremely excessive. It can become so overstimulating that it becomes stressful.
At that point, we can see that spending time alone is a relief, that is, spending time away from all the electronic media. In that state of solitude, we can finally get in tune with ourselves. At that point, we can find out who we are. Because each person is an individual, completely different from anyone else.