No because it is still on the blockchain - however you have always to have in mind that if a majority of miners is in the hand of one country and if they cooperate it is another way of centralized power. Not in the hands of politicians but a handful crypto billionaires. That is why I like proof of work of litecoin (spread over maaaaaannnnyyy miners) and I like all kind of proof of stake approaches. I am even working on an approach myself that will be posted here one day to solve the 51 % issue all and forever.