Why do people stop doing the MSQ roulette once they get all their jobs to 90?

[Colter_Hildibrand]

Same with people who stop doing ocean fishing once they get their World-Class Troller title
or people who stop doing potd when they get their Necromancer title

Isn't this sort of content (roulettes, side content, deep dungeons) supposed to be insanely fun and done only for the sake of playing the game? Why do people stop doing it once they get their rewards?
Only place I've ever seen this behavior was in looter shooter games like Warframe and Destiny and wow and it is a pervasive problem of content not being future proofed.

Same goes for bozja and eureka, I believe castrum lacus litore died on the same patch it was released and required multiple buffs over the course of 5.x patches to make it populated, and same goes for delubrum reginae savage, which was dead 1 week after its release.

First off, the MSQ roulette is literally just so that new players will be able to go through the msq, so the exp reward is literally the only reason I do it.

In my experience, castrum lacus litore never died, and the buffs just made it harder to get in. DR savage also stayed active enough until the end of ShB (and I expect more groups will go for it after the new expac tasks dies down...BA in eureka is getting popular again).

Also, there are always going to be people who only want the rewards. There will also be people who do things for the reward, and then do it again on occasion because it is fun