is competitive games more fun to play than casual games?

like, Does TheViper have more fun playing aoe than a player who've just got into the game and likes building pretty cities, making big armies and stuff? like could you tell this guy "hey, if you learn how to play well, you'd have lots more fun" or tell someone who doesn't like the game at first "if you learn how to play it well, you'll like it then"?

is competitive games and casual games totally different games, such as DM games and RM games or an Arabia game and a BF game? and whoever likes the other over the other is fine or is RM Arabia objectively the main game where the fun can reach its peaks and the casual players are missing out?

what are your thoughts guys?