So when a shoel from stam amcha asked R' Moshe a question, how was he able to rely on the teshuva without being proficient in the sugya?!
Avromie is talking about the written tesuvos, and Reb Moshe said so himself, and writes a disclaimer in the intro.
In general, Poskim, including Reb Moshe and Reb Elyashiv answer the question presented. Roshei Yeshiva give their opinion on the rest of the subject.
Doesn't this discussion belong Here?
Don't mess up that thread