I have friends that are much better actors than I am that had to quit the business because they couldn't survive the auditions or the rejections, or people just didn't realize how good they were.
Being on a comedy tour is like traveling with family, everyone is all having a great time... then all of a sudden it turns sour. One thing gets said out of turn, and everyone is on everyone's last nerve. After an hour of silence, we all start laughing about it.