It ruins my immersion that you can't crawl under rocks or climb up cliffs or invite a fine lady to personal quarters for some late night synthing. It ruins my immersion that I can't read the newspaper in game, steal fruit from stalls, or toss small Lalafell just to see how far they go. My immersion is peril because airships are instant, Chocobos appear and disappear out of nowhere and my inventory is some apparent limited void that can only hold 200 individual types of items of varied sizes and weights.

Is there anything more relative?
Maybe, but it's all relative.