I think you hinted at the real problem. Even if you have good insurance you may not be able to see your physician for a couple days. Some people choose to visit

I think you hinted at the real problem. Even if you have good insurance you may not be able to see your physician for a couple days. Some people choose to visit an emergency department when they want some kind of immediate relief from a non-urgent problem. If you show up while having a heart attack you aren't going to sit in the waiting room.