I think it’s more to do with that if the collective workers vote to become a union or not, and succeeds in that vote, then the owner/company must recognize them as the union and engage in negotiations as such.
If the vote of the workers fails to choose to unionize…well usually that means the people who tried to organize it get fired because there’s no union
From the source you listed (because I have heard of the magazines but didn’t look much into it ag the time) the author posits that the two books that had pictures of children were a gift from a fan, and the second he includes an inscription from Jackson discussing the joy of youth he’s seeing in the images and that he’s sad he didn’t have that kind of childhood. Which, weird, but not damning to me.
But I couldn’t find a credible source for the “showing children pornography” portion you mentioned, do you have anything for that? My impression so far has been ‘weird dude, if I knew him I still probably wouldn’t let my kids sleep over but I wouldn’t let my kid sleep over ANY adult’s house, especially not a celebrity’.