Why fight against something that can be monetized? Just look at how much money spot BTC ETFs have attracted in the US and everything will become clear to you.
I mean, they would have done it back then when it was still not of any much value and when it was not as decentralized as it is today.Now that the institutions have joined the game, the whole world going against it is close to impossible. Someone or some governments will always defy the directive.
I wouldn't agree that it's ever too late for the world's most powerful governments to crack down on Bitcoin - they have the ways and means to do so at any time. What would happen if the US, EU, UK, Japan, India, Canada and some other countries agreed to declare Bitcoin illegal and ban all CEXs? They wouldn't literally kill BTC, but I suspect that within 48 hours the price would drop by 80% or even more.
The price would go down, but I don't think It would be that much… and, that would not mean that the Bitcoin network would just stop operating/working Come on 
Secondly, do you think all those nations would unite at once? I don't think so. We are already having some group (The BRICS) trying to have their own monetary system away from the US dollar dominated economy, and you think they would gladly unite with the US?