StingingVelvet: The continued combination of "anti-DRM" and "anti-client" sentiments here just baffles me. Clients are not inherently DRM. If these silly cosmetic items are DRM free once you use Galaxy to launch the game, I wouldn't even say they are DRM'd at all.
It could still be considered DRM-free, but it would make using the games in a DRM-free manner a lot of hassle, I would say pretty much impossible when you start having a sizable library. Big point of the DRM-free is that you are able to archive your games for offline use (it is not what defines DRM-free, but it is one of the most important points why people care about DRM-free).
I see you have 646 or so GOG games. Let's say most of them required you to download, install and run (once) the game, before you can zip them to your archive, in order to play them on some internet-less PC, or later when GOG doesn't exist anymore.
How long and how much effort do you figure it would take you to archive your GOG games (or, let's say, 70% of them that you care about)? At least you would have to have a very big hard drive as installing the games means you are storing them in an uncompressed format, until you zip them. That is different from when you are e.g. downloading an already compressed installer from GOG.
Also, updating your archived games would mean having to uncompress, import (to Galaxy), update and re-zip the games, one by one.
So I don't think it is unreasonable at all for people to feel all that effort needed just to archive your DRM-free games with a mandatory client is just too much. Hence, a mandatory client sucks for DRM-free gaming (unless it has some kind of automated process of doing all that I just described).
Naturally, if you feel you'd never want to archive your GOG games anyway, then I feel you probably just don't care about games being DRM-free that much, which would explain why you see no problem in all that.