Yeah... The DPS propaganda is brainwashing healers into thinking their primary objective is dps, elitism on the rise, absolutely no regard for new tanks. I've seen this happen countless times in random runs unfortunately.
As a main healer I stick to the tank, if the tank does very small boring pulls, nobody is in any danger of dying, I just politely ask if they are up for doing bigger pulls. In most cases it works, in some it doesn't, so I just follow while watching Anime.
Welcome to the new FFXIV, where the only thing reminding you that people should be nice to one another is the ToS.