Their opinion is that it's a way for people to get around corporate firewalls. Kinda blind to the idea that if a browser can implement DNS over HTTPS then anything can.
Especially since there's some of ways that Mozilla have implemented for a local area DNS server to override its settings.
There's also another camp, if you remember the "internet villain of the year" award that Mozilla got for DNS over HTTPS from an ISP industry group.
Of course their argument was parental controls being made ineffective.
But of course it's transparent that this was a gambit to change public opinion so they can keep collecting browsing data to sell.
Interesting to note they went after Mozilla not Google who are also implementing it.
But really the messed up thing is that this improves privacy for the vast majority of users. Especially those people around the world where searching the wrong thing up online can lead to imprisonment or worse.
This kind of thing is a privacy improvement for millions.
And I find it shocking that people in Business IT care more about managing their corporate devices than the good of the majority of internet users.