Having been a Realtor in good standing let me add my two cents.
1) As previously mentioned by Dave very little education requirments.
2) I think it is a matter of ethics many people (not just Realtors) are lacking in this area.
3) A lack of vision when dealing with investors (multipal deals)
4) Instant gradification with a closing.
5) A mentality that they will kill a deal rather than drop their comm. I used to list investment props on a 10% comm. & yes investors worked with me because I provided the services & ability to negotiate to support that but, never would I let my comm stop a deal from closing. There have been a couple deals that I waived my comm. (got more deals from that than any form of advertising)
6) Often times people use their friend or family member always a bad idea.
7) Realtors over price homes to get listings then work down the sellers over time (bad business).
8) General Arrogance many fancy themselves better than their clients.
9) It is a career of sales smooth talking silver tunged schisters will say anything to close a deal.
I always tell people what they need to hear not what they want to hear (always better)
10) The idea that realtors don't realy earn their comm. couple phone calls couple sigatures thousands of dollars (often more than most working folks make in a month)
I'll have to come back to this thread.