@inthehands This is exactly the kind of thing I bemoan about the dAtA-dRiVeN fad that's overtaken tech management over the past decade or so.
I've gone to managers with these concerns and been told, how can you prove e.g. these docs are inadequate, that investing more in tech writers will pay off? Come to me with the metrics and we'll talk.
I can't? I don't think it's possible, not in general? Certainly not a priori.