That's an anti-feature, something one shouldn't even call internet access. Engineering entire protocol stacks around it sounds like enshrining it as if it were good practice.
It's reinforcing an inadequate equilibrium.
Once absolutely everything is running through opaque https requests we might see middleboxes go away since they aren't able to do anything anymore.
Actually solving the problem is always better than enshrining it by providing an ugly workaround. Even if it takes more time.
Imagine how quickly IPv6 would have been adopted if NAT didn't exist. DoH is kinda like that, a cludge that ultimately hinders progress.