18-20 century art was popular because there were good...
art is useful outside career field
Exactly. Outside the career field, there isn't much use of art today. As you said so, visitors cried due to the feelings expressed by art even though they didn't do art, so that rules out the use of art to a critic. 18-20 century art was popular because there were good artists that did good work. But suppose if I make one of trashy paintings or video clips, what sue will it be to me? Unless I have the skill, art is not useful for me. And if I have the skill, I would make it my career field or develop my skills by choosing it as a career field. For non-artistic people, art has no significant use in their life.