memes

Any examples spring to mind? I've built apps that are only distributed as containers (because for their specific purpose it made sense and I am also the operator of the service), but if ya don't want to run it in a container... just follow the Dockerfile's "instructions" to package the app yourself? I'm sure I could come up with a contrived example where that would be impractical, but in almost every case a container app is just a basic install script written for a standard distro and therefore easily translatable to something else.

FOSS developers don't owe you a pre-packaged .deb. If you think distributing one would be useful, read up on debhelper. But as someone who's done both, Dockerfile is certainly much easier than debhelper. So "don't need it" is a statement that only favors native packaging from the user's perspective, not the maintainer. Can't really fault a FOSS developer for doing the bare minimum when packaging an app.