the LoC count has nothing to do with the amount of processing required for training -- if anything they're probably inversely related.
the title (correctly) describes a small LoC count, which makes no assertions about the other things you mentioned.
the title (correctly) describes a small LoC count, which makes no assertions about the other things you mentioned.
I'd agree with you if it said "GPT3 in 60 lines of NumPy" - but it doesn't say that.