What he probably meant they flew a LNAV/VNAV approach crosschecking with the ILS readings.
Maybe they did, but my take from the ATC recordings is that they ended up doing an ILS approach, presumably autocoupled to LNAV/VNAV.
And there is nothing wrong with that (to CAT I) providing the raw data is monitored.
Now, maybe I’m being biased by what I would do in that circumstance, because that is certainly what I would do in that failure scenario!
ILS in LNAV/VNAV will get you lower than any other RNAV approach. Yes, you could fly it manually in raw data, but why?