I've only read things about the study, not done a deep dive. Your points are very valid. The links are there if you want to learn more.

The one thing that stuck out for me the most was that of those who had experienced intimacy at very early ages, most reported positive or pleasurable feelings when reflecting back. But the brain has a really wacky way of making sense of trauma, and those self-reports shouldn't be validated. I remember that being the biggest criticism of the study, but it goes into a lot more.