You can not eliminate the middle man in businesses, especially in this digital age, be it fiat or cryptocurrencies, because they have come to stay. Big exchanges like Binance, are cashing in on being the middle man in businesses, an unavoidable indirect business associates, in your face, waiting for you to go through them.
Certain cryptocurrencies such as bitcoin are able to eliminate middleman technically, whereas in this case it is a user's need to adjust to business preferences, especially because cryptocurrencies must really pay attention to the level of trust of the second party.
As innovation develops in the crypto industry, the role of third parties can also be built into code which is usually called a smartcontract, although some of these sometimes have serious vulnerabilities that cause greater losses.