Little Froggie
the mamar you cited of rebbi domeh lmalach is referring to a rebbi muvhak as is a lot of the rest of the stuff you mentioned which is the antithesis of the current incarnation of daas torah. No one is claiming that one shouldn’t have a rebbe/rav. The discussion here is in regards to the current modern day concept that daas torah has the equivalence of sanhedrin even in regards to mundane matters and that it comes from a divine metaphysical source that one is mandated to listen to even if the rav is not in your locale and is not one’s rebbi muvhak. As PAA and Sam2 have previously mentioned this is a notion that isn’t mentioned in the rishonim and seems to have an extremely modern source.