I completely agree with you that Steam itself is DRM and that we use it for convenience.
But I do disagree with the same statement about GOG Galaxy because it doesn’t provide the same digital decrypting functionality that all DRM provides. They don’t do it because they don’t have to, proven by the ability to download the EXE and BIN files directly even in Galaxy. I liken the Galaxy app to using a VPN or other network tool like Hibachi people have used when a game only had couch co-op support.
Either way, your point is made, but I don’t see an issue with running a client app that provides so much. I don’t inherently trust Valve or GOG, but they haven’t done anything that I know of to betray me as a gamer or consumer. I do NOT however see a point in running a client app that also has additional launchers required afterwards like all Ubi games. DRM on top of DRM is anti gamer imo.