I understand that, but I’m also pointing out that spellcasting doesn’t make a class complex either. If someone is truly a beginner, like they’ve never played before, have no idea what dice or what, and have never looked at any RPG before, computer or paper, there’s really just the fighter and the barbarian. I wouldn’t even put the rogue in this group. But I also have a hard time believing that every new player just plays a fighter or barbarian too.
I think it’s arguable that D&D 5e or 5.5 shouldn’t be someone’s first go-round with TTRPGs if they are really green.