Why do we think it's enjoyable to play a one or two session story with a character who never "levels up". We watch action flicks where the physically fit hero never becomes more than that. Yet, unless it's a "cozy" game or a one-shot game, everything has rules driving characters to become more and more powerful or competent.
Why are action / adventure RPGs so obsessed with leveling? Is there something wrong / non-fun about just playing cool characters doing cool things?