There is really no comparison between an ER Doctor and a weekly Therapist, since you will likely only see your ER Doctor once (and you may not even be fully conscious at that time) since even when you are doing rehab for the injury it will probably be with another doctor. Whereas with a Therapist most people see them once a week in some cases for several years (for some people that adds up to several hundred times in their lifetimes) so you really can't make a fair comparison between the two.