>>716365523
100%ing a game should serve as an "excuse" to continue playing it should you want to
Like oh, I really like rondo of blood, let me play it again so I can rescue all the maidens! Do I care about rescuing maidens? Not really, but I do want to play rondo of blood, so this is a good outlet for doing so, a way to channel the replayablility.
Scoring/speedrunning serve the same function, just that collecting things (even ranks) is feels more tangible than a arbitrarily faster time or higher score
I guess in something like an rpg it could serve as an excuse to hang out in the world you like longer