The C example is the wonderful happy path scenario that only manifests in dreams.

Most projects don’t have a dependency list you can just install in a single apt command. Some of those dependencies might not be even available on your distro. Or there is only a non-compatible version available. Or you have to cast some incantation to make that dependency available.

Then you have to set some random environment variables. And do a bunch of things that the maintainers see as obvious since they do it every day, so it’s barely documented.

And once you have it installed, you go to run it but discover that the fantastic CLI arguments you found online that would do what you installed this program to do, are not available in your version since it’s too new and the entire CLI was reworked. And they removed the functionality you need since it was “bad practice and a messy way to do things”.

All of this assuming the installation process is documented at all and it’s not a “just compile it, duh, you should know how to do it”.