Oh yeah, that's different.
Out of game parsers are still a thing here, so that helps. It's just that XIV is a more DPS driven game. When I played WoW (vanilla through Cataclysm), fights where as a healer I had nothing to do except DPS for extended periods were the exception. You didn't go into Icecrown Citadel and find that you didn't have enough incoming damage to keep you busy. It just didn't happen outside of a specialty fight like Vaelstraz, which was fun because it was so abormal. On the hard modes at the time, keeping people alive was all you could really do. Mimiron hard is something I remember vividly because of all the damn fire, it was a chaotic mess trying to keep a raid going during that. (And the 800 Dispels when you fought the Horde team in the Colisuem raid...)As for Sigma normal: not sure, typically I am the one that does the healing and my co healer gets the luxury of DPSing.
To be honest though: I find the FF-XIV community is far more obsessed about DPS than the WoW community. Apparently one does not need ingame parsing addons in order to breed this fixation on DPS at all. :P
Here? I mean, XIV devs tell us they don't expect DPS and then give us o2n, which can be healed by Regen and Eos easily. What do they expect healers to do the rest of the fight if not DPS? Nothing? Healer DPS rises up as a thing because the required level of healing simply isn't that hard to deliver in most of the game (savage being the exception, but since only a minority of players ever do that, the majority won't see those, and even there people still crank out significant quantities of DPS).
The meta is ultimately a response to the game that we have and what people can do in it. If SE really doesn't want healers DPSing, they have the means to do something about it. That they made it easier in Stormblood instead of harder says something about their intentions.