This isn't weird, the online installers are the super duper dope experience for the brainless mass of lemmings. Simplistic full offline setups aren't considered modern aka commercialistic enough. I don't like it too, but I'm nevertheless happy getting these setups, although finding them is detective work.
I don't think that someone who is using an online installer of whatever is brainless, especially not for a program that is meant to be as an online service like Galaxy.
I just would like to see more transparency on GOGs site.