I'm pretty sure ChipMixer never used Cloudflare. Actually, it's in the DoJ's case document that they were very much against CF.
I was under the impression Chipmixer used Cloudflare in the early days after their inception and that proved problematic for the owner. I could be wrong about that though.
In the context of the chain of quotes, they were talking about Sinbad, another competitor, which appears to use Cloudflare.
Mixers using Cloudflare or any DDoS prevention website seems completely counterproductive, it raises the question why they would even consider using those types of service.
My issue is that you can use almost anything to launder money. Gambling sites, physical cash, privacy coins, CoinJoin, and any privacy measure really.
Just like you can plan crimes using privacy-focused messengers or GPG emails.
In both cases, I think that the fact you can abuse a system does not make it a morally bad system. These systems have good intentions and are sometimes vital for many people's lives.
I tend to agree with the notion that just because a service can or could be manipulated or misused does not mean it is morally reprehensible nor that the people operating it are encouraging bad people to participate in criminal activity. Having said that, the most important thing for them to worry about is self-preservation and to take steps to protect themselves from prosecution and for that they need to demonstrate they have at least tried to actively prevent misuse of their service. I mean, there is a fine line behind any mixer such as Chipmixer and any exchange such as Binance.
Who knows, maybe in the coming months or years Binance will be suffering the same fate with allegations of money laundering against their owner Changpeng Zhao, that eventuality does not seem impossible.