Is Rolemaster Rules Heavy?

I saw a survey today that listed Rolemaster as an example of a ‘Rules Heavy’ system. If you bought ALL of RMC that would be Character Law, Arms Law, Spell Law, Creatures & Treasures and Companion 1 you would have the entire published system and the entier page count runs to about 800 pages. That is roughly the size of just the three core DnD 5e PHB, DMG and Monster Manual.