With the availability of this site, why haven't more lawyers, teachers, doctors & pastors gone out of business?

This site is amazing! I can get all my needed legal questions answered for free, receive free medical advice and have the Bible interpreted correctly because of Yahoo Answers. I fired my mechanic, attorney, pediatrician and stopped going to church because I can use this site to get all of my answers to questions I once, foolishly paid money for "professionals" to answer. With this site being available to anyone with internet access, why are these professions not becoming obsolete?