While this is sort of nit picky, in the context of Raids that we are currently on, I do expect the DPS to look after themselves as far as healing certain things. Second Wind/Blood Bath/Mana Wall. While insignificant for sustained healing if they aren't going to be damaged again for a while and it saves me a GCD to DPS I absolutely require it to be used.
Rightfully so, that is the current Healer Meta. SCH stems from a DPS Class (Arcanist) and has a very powerful Healing Pet. Anyone who Raids knows the difficulty and stress of Raiding. It's not just on the Healers to perform well, everyone needs to pull their weight. So of course it will be the expectations of the community that if you are going to Raid that you should be competent at the role you are playing. There's a reason it's called the "Hardest Content" because you can't just squeeze by with minimal effort, which in turn makes the gameplay of it "Stressful" at times.
Outside of gameplay of a role that should have been learned from level 1->60, raid groups will also look into gear, especially as Off-Healer. For one thing an Off-Healer better be accuracy capped either with or without Food especially SCH due to how it allows MP recovery from Energy Drains. That's an immediate Red Flag that someone is going to under perform before any fights even begin and shows they have limited knowledge of the Healer Meta and/or their class. Even if someone is inexperienced they should at least cover all the basics of their class because those are things you don't want to have to learn/struggle with on top of learning the fights.
FFXIV has a great community, so instead of posting in a thread full of people that are Pro-Healer DPS, about how you are unhappy with how you perform as a SCH Support Healer, you should put your energies into creating your own thread stating your difficulties and ask how you can become an amazing SCH that any static would line up to run with.