Joseph-
I guess I shouldn’t have used that terminology. I don’t disagree with the Tiferes Shlomo. I am clarifying what I think he meant. To argue the other side meant to be an argument on those who understand it differently.
His one example is that Klal Yisroel followed Moshe Rabeinu’s “absurd” military advice. I don’t know if Moshe Rabeinu was a military expert (I wouldn’t be surprised if he was), and he was using his Da’as Torah plus his military expertise to make a decision, but even if he wasn’t a military expert, if anyone can extract military expertise from their pure unadulterated Torah knowledge, it would be Moshe Rabeinu. I don’t know if that can be extended to any talmid chacham.
I wouldn’t be surprised if the Tiferes Shlomo would agree that one is not lacking emunas chachamim if he doesn’t listen to the business advice of a talmid chacham who has no business experience.
What would be the category of the gedolim of our generation like R’ Kanievsky or R’ Shteinman? I have no idea. I have no idea if their Torah knowledge is great enough to be able to extract information that they have absolutely no expertise in like medicine. But I doubt that anyone other than the upper echelon of Talmidei Chachamim nowadays has the capacity to give advice in an area that they know nothing about, regardless of how much Torah they know.