PT25.S1.P2.Q8 - main point question

Rev_Lefe

Hi all,
I picked the right answer but my prediction of the main point was quite different from the language of the credited choice.

My prediction: the origin of the scholars' nonpoetic emphasis was due to Milman Parry.

When I read the first paragraph, my attention was caught by this sentence "Something wsa driving scholars away from the actual work to peripheral issues" (Lines 14-15).

Could someone explain why the reason/origin of the nonpoetic emphasis is deemed as not a part in the main point?

Thanks!

Admin Note: https://7sage.com/lsat_explanations/lsat-25-section-1-passage-2-questions/