The OP was right, though. Just making the data accessible and documented is a huge undertaking. It's truly a laudable effort.

From the other side, I cannot imagine using the data without intimate knowledge of the entire setup. There are very few people that can look meaningfully at such kind of data, which is why publishing the dataset (and all the work it involves) is often neglected.

Not to defend the behavior in any way, but remind yourself: in the current research model, if you can't make a publication with it, it's not worth your time. For a dataset, I've seen people factor-in the effort to make it public VS the potential citations you could get out of it.

disclaimer: I work in research