This meme uses the "Anime Girl Hiding From Terminator" template, in mexico filter, where the text 'I, who can't even write 100 spells for my TTRPG' is layered over the anime girl, and 'Rolemaster casually having 2000 spells in 162 spell lists and 15 magic classes' in the Terminator, which is referring to the quantity of spells in the Rolemaster RPG's Spell Law book, one of the fundamental books alongside Character Law & Campaign Law, and Arms Law & Claw Law. And yes, before you say it, I know they're called professions, not classes.
Point taken, but they also still had the resources and people to make that many charts.