A couple other points that bear mentioning:
ENB and AGermanSpy authored the official BB (and DS2 iirc) guide(s). As far as OG loretubers, ENB was the first. The most Vaati can claim to have on that was trying to sell the Internet Salt & Sanctuary.
I'm not sure if this is common knowledge or not but ENB either married a Japanese woman or moved to Japan after getting married, where his wife had a miscarriage. This all happened right around when BB came out. As you're aware, miscarriage is a central theme of BB and this caused him to have a massive breakdown and his uploads more or less ceased after that. He might have done one or two things for DS3 but his brand was already dead.
The PBH debacle happened right after ENB disappeared. If ENB was still regularly making content, there's a good chance that Vaati's career would have ended then and there but there was noone to fill the loretuber kingpin gap besides his ass.