Uh, have you not heard of Heroic? It’s by far the most comfortable method to install and run GOG games on Linux

To reiterate the above:

I’ve got better tools to launch programs

I don't want a GUI "game launcher", thanks. I have a number of general-purpose, more-capable systems for launching programs. Not Lutris, not Heroic, not any program that requires throwing up a window and is intended to just start games. I don't have a "word processor launcher" or a "web browser launcher", and I don't need a "game launcher".

I'd dump the Steam client if a number of Steam games didn't require it to be running for their DRM to work. Hell, for a few games, like Caves of Qud, which don't rely on Steam for DRM, where I want to run the thing on other systems and don't want Steam even installed, I do exactly that.

EDIT: Sorry, guess I was a little snappish, if you were just suggesting it WRT OP's concerns. Having to use the Steam client to launch Steam games has been something of a pet peeve of mine; ordinarily, one can configure pretty much whatever one wants on Linux, but Steam's a closed-source black box, and the source of several of my "my computer doesn't do precisely what I want" irritations.