Why does a Rank 10 Chocobo heal more than a BiS SCH's Fairy?

[GunksFoy]

Fairies only have about 60-70% of healing potency as the Scholar does. So Embrace is more like 180 potency iirc. Its not 250.

Source on that? SE says 250, so that's what I'm basing that off of. Regardless, if that's true, it was still only a ~50 potency nerf as it would be been less than 300 before.