That experience is highly dependent on the Linux distro you're using. Steam comes preinstalled on gaming-centric distros like Nobara or Pop!_OS. More "general purpose" distros like Mint or Ubuntu might require adding an apt repository before you can install steam from their GUI package managers, but adding an apt repo can be easily accomplished with a GUI as well.
Basically, if there's no guide for installing steam for a given distro, or the process of installing steam is more than a couple easy steps, that specific distro probably isn't well suited to run steam.
Good quality jarred sauce is basically just the passata, onions, and garlic already prepared. Starting from those individual ingredients isn't going to somehow be a million times better than just starting with the jar.