FWIW better more experienced agents prefer to be on the listing side. That way you are almost certain to get paid. Its easy to find people to drive around and show homes to. Closing rates on buyers are well under 50%. Getting someone to trust you to sell their home requires much more confidence.
Also to put some real numbers out there avg sales price across those 136 listings is 333K and average commission is probably around 2.5%. That translates to $1.13M. Look at his website and look how many people there are on his team. Drive up the freeway and look at his office space in Del Mar/Solana Beach. Throw in TV commercials, web advertising, marketing of properties, flyers, signs, office equipment, self employment taxes etc and that big top line number gets alot smaller very quickly. He does a real nice business but dont kid yourself that he’s netting anything close to what you suggested.