Out of interest, which programs do you need to install via terminal that concern the average user?
For example installing the GPU driver for an older GPU. Or installing the driver for an obscure printer, touchpad or other weird hardware.
Average user doesn’t mean total noob. Installing Windows and the relevant drivers is something many users in the “Gamer class” can do. These guys usually don’t to command line (except for maybe pinging something), but they are comfortable with installing and configuring stuff in GUI.
They understand how to google the driver to their weird hardware, download the .exe or .msi, start it and navigate the install wizard.
On Linux I’ve had it a few times that you e.g. have to unload/load kernel modules and stuff to get a driver working. I once even had it, that the Linux driver for a device was only supplied in source code to be compiled with an ancient version of GCC that wasn’t available over the package manager. So then I spend an hour or two fixing compiler errors to upgrade that old source code to work with a current GCC.
Getting the same hardware to run under Windows meant downloading the .exe and running it.
And yeah, that’s not something you’ll do on a daily basis, but it is a huge roadblock for someone afraid of white text in a black window.