FFXIV has a lot of role overlap. Healers have some of the best tools to shield and heal up raidwide damage. But tanks and dps contribute here too, with abilities like Veil, Shake, Addle, and Mantra. You might think that only tanks are involved in mitigating tankbusters, but both healers and dps are involved here too, with abilities like Adlo, Benison, Palisade, and Apoc. Similarly, you might think that a dps check is purely the remit of damage dealers, but more often than not, tanks and healers find themselves playing more aggressively to push those last few percentages into a clear.

At lower difficulty levels, this means that good players can cross compensate for weaker players. At higher difficulty levels, this sort of "cross-role" gameplay isn't optional. The goal is never to just "do your job". The goal is to contribute everything that you can to your teammates so that you can win.

RDM and SMN are dps. Why should you raise dead players? Raising is a dps loss. Let the healers do it. After all, it's their job. Not yours. Your job is to mentally afk while creating an exciting fireworks display. If you wipe, you can always blame it on them. They should just heal better. Right?

If a dps refuses to use their enmity tools, you're forced to find other ways to make up the difference. At the end of the day, your goal is to clear the content, and do so as efficiently as possible, even if it means losing out on a bit of dps. Sometimes you have to work around a weaker player. But that also means that when you have a choice of teammates, you're going to pick someone with a similar mindset. Not someone who thinks that it's "not their job" to use their toolkit to its full potential in order to win.