I agree, especially since the game lets you change jobs whenever you want, it can feel like the job system is pointless when all the jobs in each role basically have to do the same thing or there are basically only 2 options. I'd much rather have jobs that are good at specific things and bad at specific things so they are better or worse in different fights. That would give an incentive to swap jobs and play a role instead of a main job but I also get why they don't, it would take a lot of work to make leveling and gearing a role accessible and all the content would need to be balanced to not be lopsided in favor of a few specific jobs most of the time, it's a tall order.