The motivations are many and impossible to be certain of, but one thing you said is definitely true: "crypto enthusiasts need to put out maximum efforts to empower decentralization."
In a decentralized world, the public has complete control over what happens and is dependent on itself alone for its prosperity or demise. No one is going to give us freedom we have to take it!
You correctly noticed, no one will give us decentralized freedom. The process of globalization of the whole world is going on in all spheres of life, including the blockchain technology. In the blockchain technology attracted billions of dollars, and where there is always a lot of money regulators.