You are being limited into where you can spend these points. A year from now you may be maxed out everywhere, but right now you’re not.
just saw there was a nerf to Rich Soil for herbalism. If something is deemed potentially ‘too good/game breaking’ its definitely within the rights of the team to alter it, but when you are screwing over players who put their knowledge points into that basket after seeing the potential for that perk (which no longer is the case) that’s pretty lame.