DoH isn't "magic". It's just a simple, standardised protocol. It's existence makes it no more or less easy for adversarial actors to do name resolution.
DNS should be an OS level tool which is consistent to all applications, not an application by application setting.
As the device owner I expect dns to be ck distant whether I run Firefox, chromium, zoom, curl, steam, ping, or he dozens of other programs I run.
The knowledge of what ip address correlates to some hostname is just data like any other data. There is nothing magically specially different about it, and no way to differentiate it from any other random data that every single process processes.
It's a meaninless wish for something that you can't have, that we all agree would be nice, but is silly to expect.
An app can simply include it's own hard coded list of ips if it wants, or some totally home grown method for resolving a name to a number from any source. It's just key=value like all the infinite other data that every app processes. normal dns and doh are nothing but standards and conveniences, they don't actually control or dictate anything.
You wish apps couldn't do that? So what? Do you also want a pony?
edit: Unless, naturally, I am no longer an admin and any control I have over my hardware is merely an illusion.
It doesn't matter how much you might want otherwise. It doesn't matter how important and virtuous the reason you want it is. Even invoking the mighty untouchable power of "my daughter" does not change such a simple fact of life.
