In your exemple, the baby is a person who never tried a MMO in his entire life, it’s not related to the game itself. A basic class is a Novice like Ragnarok first class, or Free Lancer from Final Fantasy games. Archer, Swordman, Cleric, Wizard are not “basic” as they are already sepcialized in one particular thing. Actually the game teaches how to move, jump, interact with events, but it doesn’t tell you how to use your skills wisely. Or tell me when did you see a tutorial to use Bash, Heal in ToS ???
I have to add one thing to this : Dark Souls2 and 3, limitless options made these games really bad ?