I mostly do professions as my gameplay. I like making things and selling them, simple as that. When I start working on an alt for professions I collect all the knowledge, level it up, do work orders, spend points in the way that will be profitable. This can take hours per character.
When significant changes are done to something in a profession and it ruins the market for what you specialized in, it’s a literal slap in the face. You are stuck with your knowledge points spent and you can’t change it. Now that profession on that character is essentially dead for weeks/months until you have the rest of the trees unlocked because it’s time gated.
Do better, don’t waste my time as a player.