Basically just go the the folder and run bin\x64\Cyberpunk2077.exe
The "Launch Cyberpunk" shortcut in the folder starts Galaxy and then runs the game from there.
Games using things like steam input might also require steam to be running so there is some drm free games that might not run also. Some of those will if you move them outside the steam folder / rename Steam.exe. If you leave them in the steam folder the game will start steam for you if when you launch it.
Also don't knock those zip files purchased off of itch.io. Sometimes it's good to visit a cottage industry to see what's passing under the radar of the big guys.
Your usual publicly traded (or owned by publicly traded entity) corporation in its accidental intelligence does not
Why? If another platform also disrespects me, does that mean Steam doesn't disrespect me?