Any answer other than “yes, for some content” is deception.
Priests have a unique problem: they only have one non-healing spec. If the content doesn’t need a healer, and I don’t like Windwalker, I can go Brewmaster. If I don’t like Protection, I can go Retribution. If I don’t like Feral, I can go Balance or Guardian. If I don’t like Enhancement, I can go Elemental. If I don’t like Shadow, I either play Shadow (awkwardly) or go fake-DPS as Discipline.
Making Shadow attractive (or at least tolerable) to all Priests would be very difficult. It’s definitely beyond the capabilities of the current class developers. So a solution to this problem is tricky. Discipline could be turned into a DPS spec, but that would create animosity among happy Discipline healers.