Even though you can't point to a single in-context reference

Huh? Nowhere in the .65 is the initial heading assignment referred to
as a vector. Such assignments are on occasion given by towers who
have no means of providing obstacle protection, hence they are not
vectors. Simple, eh?

Most of the rest of your post is an effort to establish dominance by
delving into a lot of ATC minutiae that really aren't relevant to the
above point.