Why is there a push to discredit this study, seemingly all of a sudden?
A. New evidence is available as stated clearly in the headline.
This is huge IMO and I haven't heard about it until now so I think it is good that is being pushed again.
New information has surfaced, so people are going to have new material to add to the conversation.
When I was in college decades ago... same thing, lots of talk about that study and how silly it was / warning to think critically about things.