DoH and DoT are just new delivery technologies. You've always been able to securely tunnel your traffic out of the country and you always will as it's trivial. DoT changing the resolver from one public company in the to another public company of the will not prevent the government from issuing warrants, particularly since they already issue warrants to these companies as it is.
Common carrier defence is not going to be lost from encrypting URLs, the same FUD was spread about encrypted banking then the encryption of most websites. The only thing that has resulted from the increase in encryption is the decrease of ISP injected ads and the decrease of customer tracking information being sold.
There is a volume of ability north of 95% which could be lost, and the ISP has a mechanism to act (block DoT) but in DoH, its less simple. Hence, the liaison between Mozilla and Google, and state authorities.
Why do you think Mozilla turns this on selectively?
Common carrier defence is not going to be lost from encrypting URLs, the same FUD was spread about encrypted banking then the encryption of most websites. The only thing that has resulted from the increase in encryption is the decrease of ISP injected ads and the decrease of customer tracking information being sold.