Chelsea were the most recent large club before the oil state clubs to use owner wealth to successfully break football apart
Other clubs have done it before (Blackburn rovers for example), Chelsea are just the most notable recent ones who took it further than it had gone before, until the oil clubs overtook them.
The oil clubs are doing the financial doping but also it’s much darker with them since they’re sportswashing as well - abramovich might have been a bastard but he’s leagues behind Saudi Arabia and the like in terms of crimes against humanity - hence those clubs are the new poster boys