The dominant kind of snobbery that exists nowadays is job snobbery. You encounter it within minutes at a party, when you get asked that famous iconic question of the early 21st century, "What do you do?" According to how you answer that question, people are either incredibly delighted to see you, or look at their watch and make their excuses.
In the theatre, we are all equal. The stage is a place where social hierarchies dissolve, and we are left with the raw essence of humanity.