There are of course multiple social medias, but an artist isn't only valuable of they are the preference of the masses.

Many great artists are the preference of niche groups. The internet reaches far and wide and bring these artists, these masters of their craft, to their fans all over the world. Whereas if they only exist locally, they may only come across a handful of people that enjoy their work, and their talents will go unnoticed and people that would love it will never experience it.