After watching a certain chair's video It dawned on me how FFXIV provides separate combat content for different kinds of players:

Do you want to play on the more "hardcore" side? Here, you have high end content with Ultimates, Savages, Extremes.

Do you want to take it easy and go at your own pace? Here, you have non-combat stuff, housing, cosmetics, RP. Or combat stuff with Dungeons, Roulettes, Raids etc.

The game offers variety in the levels of complexity and preparation required to face its content and that is great. You know where the game doesn't offer variety and has casuals and veterans step on each other's toes?

Job design.

You will be forced to have the same kit wether you play hardcore as a healer or casual as a healer. This is the inherent problem each "side" seems to be having. That you can't touch the kits (lol) without upsetting either side, since they share the same toys.