Your idea of throat hit and the vast majority of vapers is quite different. Regardless of the PV one is using, there is no throat hit with 0 nic eliquid. Warmer air, but no throat hit. I have vaped 0 nic on a mech and it's just warmer air with no hit what so ever. I would challenge anyone to vape 16 - 24 mg nic eliquid and then vape 0 eliquid and tell me the throat hit is the same or even exists at all in the same way 16 - 24mg nic liquid provides throat hit.
Only those who want no throat hit at all will find 0 nic eliquid satisfying IMO.
I can't speak to whether she feels TH or not...that's up to her. But I agree with you that for me, I need some of that TH and that a lot of it comes from nic. I try to keep TH down so as to not get too much lung irritation. But that's part of the RITUAL to me. And the pharma-NRTs don't give me that. The gum and lozenges can even be peppery but it's not the same. Too much stomach irritation and ...it just doesn't "feel" the same.