@john chapman
"Great! I'm your guy. I'm going to put your house under contract, meaning I'm going to enter into a contract to buy the home. I don't actually have the money to buy your home, but don't worry. I'm going to go out and try to find someone who will buy it. I'll put ads on Craigslist and use bandit signs. If it all doesn't work out in 30-60 days, I'll just back out of the contract. How does that sound?"
What you explained is exactly what a realtor does except is the seller who had to get out of a contact when the realtor can't sell the property.
They use craigslist and signs as well as the mls, so I don't get your argument. Additionally, the realtor is not expected to be able to buy the house if they can't sell... I mean if the seller knows up front that a wholesaler can't buy and they plan to broker a deal AND the seller agrees to assign the contact to the wholesaler then what does it matter? As long as the terms of the contact are clear and the seller still agrees then it's all good.
It sounds to me like some realtors and brokers have had bad experiences with some shady period bit truth is, licensed or not, there are shady, unethical period in all aspects of real estate.