You're not alone in thinking that lol, many have come into this thread posting the same conclusions about certain posts
Also no the devs have never said such, it is simply leaps of logic being made because some people have already decided they do not want High Elves to happen.
And yes it's a lot to write/respond to, but you did really great and I enjoyed reading this, which is why I personally don't bother anymore.
It'll just turn into circular posts that go nowhere, I would personally put effort/time towards focusing specifically on design ideas and what could be added to High Elves.
Once Blood Elves get their customization pass it'll also make it easier to suggest what High Elves can get as well.
Like from an image in the OP of this thread:
The blue colored highlighted braids can be an aesthetic differentiation from Blood Elves, as well as all those feathers in the hair/ears akin to the recent options Wildhammer Dwarves are getting. It works since High Elves and Wildhammer are said to have good relationships!