But the hosting providers have physical access. You don't. They have controll you don't. You can't argue decentralization if all the nodes are owned by a couple of hosting providers.
What's the point though? A 3rd party (kuyun) still has full control over it. No different that doing it on AWS except that you pay in Monero. This is not good for the network since again one party has control and is being payed to host them.
Shorting Monero and then attacking would most probably be the most profitable.
https://en.m.wikipedia.org/wiki/Decentralization