Which person?
For medical issues, a doctor. For legal issues, a lawyer. For political issues, a liar 🙂
You are the one who said you won’t mention specific people.
If daas Torah means extending what you ask a talmid chochom into areas beyond Torah, then the same way, despite not having a R’ Akiva Eiger or R’ Moshe Feinstein today, we still find someone who is a talmid chochom to ask our shailas in Torah to, we would also find a talmid chochom to ask our non Torah shailas.
Why? We don’t (and didn’t) ask Rav Moshe where our donkeys were when we lost them.
So you too are saying that ZDs claim is specious.
I can’t comment on cars, but if we need to go further, I don’t think anyone asks their Rov if they should have Chex or Cheerios for breakfast.