Compiling from GitHub is cherry picking the worst case especially for “most normal people” and frankly they should be using the software store GUI in their DE to install and update software with nice easy buttons to click.
Frankly software management for a normal person generally is easier on Linux than it is on Windows for stuff made to run on Linux.
But don’t worry someone will respond with nvidia’s shitty proprietary drivers.
To install Steam on most distros with popular DE’s, you click the software store to open the software store. If Steam isn’t listed in the front page then just click the search box and start typing Steam.
When you see it, click the install button.
When it is done open it by clicking the Open button or pressing the Windows (or Super) key and type Steam. Click it when you see it.