Actually what you would see is more folks having fun on jobs they enjoy. For example, I would love to spend purposeful time in Abyssea on my smm having much more fun then whm which is a chore. As it is folks just level jobs to zerg on and use those instead of playing something they enjoy. Whats so very wrong with with the desire to really have fun using a character you like playing on a video game? I believe the main purpose of playing any game is fun and relaxing. I have always felt all jobs should have a purpose in the majority of content in a game.
Why do so many folks advocate punishing oneself on a video game by being compelled to play a job you don't enjoy as a means to an end? I understand that it is ultimately the decision of the game designers but if we advocate for this it is will just encourage them to not seek ways to involve more jobs. How come we can't at least have a balance of procs between fun and chore type jobs? That seems more reasonable to me.
Disclaimer: I believe to op is suggesting making existing procs available to to more jobs not add new procs to the game itself.