They're trying to get their hands off XMR because of for sure mandate of the government and they're just following. And as for most people that are saying Binance is the best, can't stop them from telling that if they have a good experience on it. They're not also obliged to trade XMR and what other features they enjoy there is like being on the launchpool that gives them more money upon projects that have become successful with their launching. So, its' a personal decision to say whether Binance is the best and it's out of their control if Binance delists privacy coins because it's common since the government have stomped against these type of cryptos.