I'm curious. What do people think "skill" means?

To become skillful at something requires learning and practice. You learn the rotation of a boss, how to handle it, then practice it till you conquer it by (hopefully) making no mistakes.

FF14, from my experience, is not very different from most MMO's. What probably makes it feel the most different is the long gcds, so the game can sometimes feel more proactive than reactive. Then there are the punishing instant kill/wipe mechanics that are much more prevalent in this game than most. On another note, there are some boss moves that require you to react extremely quick and can come as a surprise because of RNG. Wild charge, t10/11 tethers, thunderstruck/2 stack of fire, megaflare(the third part of it), earthshaker, redfire(sorta), and to some extent sharing the stacks before rage of bahamut are a few RNG mechanics I can think of that are reactive.