One of the reasons I use containers instead of installing things directly is that i can completely uninstall a service by deleting a single directory (that contains a compose.yml and any necessary volumes) and running a docker/podman system prune -a

or that i can back up everything by backing up a single "containers" dir, which i could have on a subvolume and snapshot if i wanted to

systemd/quadlet on the other hand makes me throw files in /etc (which is where you're supposed to put them, but ends up resulting in them being tangled together with base system configuration often partially managed by the package manager)

The Solution™ to this is configuration management like ansible or whatnot, which needlessly overcomplicates things for the use cases i need (though they're still useful for getting a base system "container ready" wrt ssh hardening and such)

tldr: i want my base system to be separated from my services, and systemd integration is the exact wrong tool for this job