Is this a joke? The main way most Linux users install software is still via the command line.

I reject the premise that the command line is not user friendly.

With either a GUI or a command line, the first step is going to be “Search the internet for the instructions.”

The second step for the command line option is “ctrl-c, ctrl-v”. The task is now complete.

The GUI option is only superior if it allows the user to skip the “Search for it” step. If it does not, now you are manually searching some arcane hierarchy for the specific location the developer decided to place that option.