Most safety investigations that I've seen have done a decent job of sorting out the CFs, Fs, and NFWODs. For the most part, this thread is drivel, imo.
FWIW, I'm probably biased, having a degree in HF. Actually, I took a few classes with Doc Weigmann at Illinois; great prof, and I don't remember him coming off as peddling tripe to further a rabbit trail agenda.
If anything these days, its this, to some degree: