If I, a developer, want my application reach interested users, I find package maintainers for it, or become one. Debian folks have gone to great lengths making it as simple as possible (but not simpler than that).
No sane Linux user will want anything that hasn't been properly examined, passed QA wrt all dependencies, and packaged by someone competent.
If you want something that's not in your distro, maybe your choice of distro is suboptimal. If you can't find it in any current distro, either you or program author are doing it wrong. Distribution tier exist for a reason.
Gentoo people have a very disparaging word for it: slackwarization. Also, no bug reports will be looked at if your kernel is tainted (notably by nvidia drivers).