Not that I have ever contributed to open science, it certainly has a net positive effect on education, which I would certainly rate as beneficial from that perspective.
But especially for data sets, open curation would be awesome. Of course scientist need to eat too, but if it comes to publishing, we don't have a beneficial system for anyone aside from large publishers. The still do some form of curation and this isn't a trivial service, but still...
Sure, data can also lead to false conclusions, but this isn't really an argument.