Watching content before actually doing it?

[Dreamer]

I blame it on the unforgiving mechanics and the rotations/phases style end game content.

Pretty much this. This is a result of FFXIV's horrible dungeon and boss design, not the players. If the developers design game mechanics (there are way, way, WAAAAAYYYY too many instant-kill situations at max level) that punishes not knowing the fights, players are going to develop a matching mindset.