I'm in the raider court that likes Dissipate, because the amount of upside utility it offers in some end-game/savage situations can end up the SCH being in a better situation than not using it. Like others have mentioned, there are downtime parts of some raids where you really don't need embrace spam, and parts where you can trust your raid main healer to keep things going, as DPSing is resource intensive. Some forget outside of free stacks, the amount of natural MP gain from the 30s fairy downtime should factor into the re-cast for fairy, then the natural Aetherflow cooldown time. Fairy re-cast cost is not an issue, nor has it ever been for myself, only if you had to blow Swiftcast for other reasons during the time.

I do think some Scholars feel like they are almost lost without their fairy at any second in the game, and may have trust issues letting their main healer do some lifting when they have practically full resources. Just hearing some of the A2S comments tells me some of this maybe true. If anything, it's me pushing for fairy nom noms because I enjoy taking on what I can to solo heal without fairy assitance as main healer.