Memes

Yep. You wouldn't have adventurous magicians going out and casting spells against dragons. The variety of spells known by D&D type wizards wouldn't even be a thing. You'd have a guy who was a specialist in ritual-casting flame spells whose job consisted of continuously heating up cauldrons of metal ore so it could be smelted. If he was jumped on his commute home, he couldn't fight the attackers off with "fireball" or something. Maybe that was covered in school decades ago, but he's spent his entire career doing nothing but that one smelting spell Or, you'd have the "Gate" wizard whose entire job was to keep up a portal for their entire 8 hour shift, so that tourists could pass back and forth.