I don't understand why they would take a story and then adapt it into a TV series that says the exact opposite.

I see this happen a lot with TV shows where the people who are making the show genuinely don't seem to give a shit about what was in the original work.

I get the impression that people who buy intellectual property rights to existing works actually hate those works and their fans and would like to remove the themes, motifs, and messages of the original work from the common culture altogether.