So pre-calamity, everyone could see moogles (if they weren't hiding), but the gift of mooglespeak was the hard bit and, unless taught, was generally considered to be echo-given.
Somehow things have changed. Putting aside the fact you can understand them pre-starshower (because the opening cutscene has its own argument for echo-blessing), now it's about being able to see them in the first place. Supposedly, you have to be special in order to see them.
Any thoughts on the change? It seems somewhat disingenuous to have creatures that can't be seen (or understood) delivering mail.