i was certain of the same worst case scenario until I started to properly read and study the LLMs output. prior to that enlightening, very wise choice, I speedread/skimmed and checked for grave bullshit/hallucinations only.
now i am convinced that it's the same matter as with people who forget most of what they learned after the actual exam vs people who go nuts and can't progress if they didn't understand a foundational part of a formula, fact or theory.