I feel this is part of greater effort by the powers that be, to squeeze the crypto markets away from decentralisation and to have some kind of control. The individual crypto currencies can be decentralised, but the exchanges themselves can be used to effectively control those decentralised cryptos
Governments are experts at dealing with centralized enemies, this is something they have been doing since the they exist so it makes sense they are really good at it, so any point of centralization is a point of failure just waiting to be exploited, so centralized exchanges are going to be used to try to regain some kind of control over this market, however with the advent of decentralized exchanges then the control they can get indirectly through exchanges will not be anywhere near as complete as they expected.