Right, so that generally falls into the category I identified in the first comment: stuff that people on the left say in the heat of the moment, but don't stick to. She was, at the time, being interviewed by the notoriously fiery Ta-Nehisi Coates. It's kind of like comparing Elon Musk smoking weed on Joe Rogan to someone who smokes weed at work every day.

I really doubt AOC actually believed at any time that the world would end in 2030 (cf. Paris Agreement's 2030 Agenda).