Bitcoin mixing is one of the headace for regulators so they will impose restrictions on exchanges like binance or coinbase. This so called risk management is indirect statement from government to evryone who are trying to hide their wealth under the privacy blanket of blockchain which is just a myth these days with all those mandatory KYC for even small amount of $1000.
This is the reason why a lot of countries can't impose regulations because most of them don't know how to handle cryptocurrencies. If they don't understand its nature, how they can implement such regulations? So to minimize possible money laundering, they need to impose such procedure otherwise, they may be missing something along the line. So this kind of regulation is not surprising.