I will be very happy if most country choose to ban centralized exchanges, this would strengthen the decentralization and the market will be mature because they will learn how to self custody their coins. There have been many centralized exchanges getting hacked or bankrupt, the victim will say Bitcoin is scam if they hold the coins in CEX, unfortunately most people never learn about it.
But that will certainly never happen although it is the scenario that privacy and decentralization enthusiasts dream of. And what is happening is the opposite, the government even supports centralized platforms because through them they can control and manage investors like us. And with the recent attempt to attack mixers, I fear that in the future DEX will be their next target, don't be naive to think that they will support DEX and P2P development when neither of them will be beneficial for them.
Just because some governments have failed to control and operate their economies, they have no reason to blame and they are looking to blame centralized exchanges. That doesn't mean the rest of the countries are doing the same stupid thing. I guess the OP is talking about the Nigerian government with their recent accusations about centralized exchanges.