If you want restrictions, have the discipline to apply them to yourself. There's no reason you can't do this. If you don't want to use the system, don't. Only use LNC abilities on your LNC if you prefer. But don't howl because others want to make a spear user that can also nuke or who use LNC ws on their GLA because the animation looks neat. You want handicaps and limitations, there is not a thing in the world stopping you from applying them to yourself in this game.
So I don't see where the argument is really. There will always be people insisting you must play a job this certain way. At least in XIV you can tell those types to shove it and still be able to get things done the way you want to. If you really want restrictions, find a group of people who think this way and hang out with them. They were really, really easy to find in FFXI...
Oh idly, I hear /dnc is the new /nin now in some circles over there, btw. I bet that stinks for the masses who leveled up ninja subjob just so they could get in parties. Now they're gonna have to level up another job just to be cool again. You really want that kinda bullshizzle to happen here? I think I'll pass.