Why don't you like intermediaries?

I just found two intermediaries today. In fact, they are basically the transmitters of information and intermediaries between the two sides. Regardless of the service quality of the intermediary, in fact, most people don't want to find an intermediary. After all, there is a part of the premium to be paid to him, but the problem is asymmetric information, and the trust between people is limited, especially when money is involved. So a formal intermediary was born. The key is form. If they can provide quality service, it is worthwhile. But the reality is that many intermediaries are talking nonsense, and they are actually a mess. After eating, the landlord will eat the buyer or tenant. It is necessary to strengthen industry norms and standardize company operations.