One should never pipe curl output into `sudo bash`, but I think you've got things quite backwards here. Barring some extreme edge cases, putting binaries in /usr/bin, icons in /usr/share/icons, config files in /etc, libraries in /usr/lib and so on, are standard across the the Linux workd, and simple utilities that are just archives of binaries, docs, and auxiliary files can easily be deployed to most distros with a common install script.

This is far, far less complex than having to maintain and distribute an entire bundled runtime environment, deal with inconsistent behavior with the local config, etc. Flatpak and AppImage have their use cases, but by no means are they simpler than just putting binaries in the right places -- they are in fact an entire additional layer of complexity.