I had independently also created a bug report here:
https://octowow.st/bug-report?id=902 since I hadn't seen Skyroc's initial post here.
just adding to what Skyroc has said, there is also more confirmation that I found after a lot of digging through turtle's old forum in webarchive:
- “A confirmation dialog now appears when changing blacksmithing specializations.”:
https://web.archive.org/web/20260421154 ... hp?t=22642
- Swordsmith Specialization will now be lost upon dropping the Blacksmithing profession."
https://web.archive.org/web/20260421040 ... hp?t=18818
also some post from another user, this time on reddit (check first comment):
https://www.reddit.com/r/turtlewow/comm ... alization/ - "If you dont like it, you can change your specialization for free in Ironforge, next to big anvil. No idea where for horde. CAUTION: YOU WILL LOSE ALMOST ALL RECIPES. "
So it is for sure how it used to work in Turtle. And it makes sense that it did work that way, since otherwise it'd be extremely punishing to blacksmithing only for no reason (leatherworking/engineering still have the Soothsaying book) and also there'd be no point adding cool BoP items gated behind a blacksmithing specialization that you can never change or unlearn (even if it would come at a great cost)