i think you are misunderstanding the point of the no preorder movement. There never should have been an expectation for it to improve the Day 1 quality of game releases.

“it’s the culture surrounding preorders that is most responsible for the trail of broken and unfinished games that clutter the sales charts” Kotaku 2015

“By pre-ordering, you’re also saying that you’re ok with them cutting content, and that you don’t mind the bugs and problems of the launch copies.” Techraptor 2015

And many other articles or reddit discussions about the topic. That’s what game journalist told the gamers and what many believe. The consumer protection was always the part that made sense, but they tried to push this idea of we could fix the broken release culture by not pre-ordering.