This is awesome... Why couldn't we have this?

[Felis]

Ascians are not the reason why they summoned the Primals, they merely taught the bestmen how to do it.

The Ascians don't just teach, but also create the situations where the beastmen use what was teached to them.

As an example:
They worked together with the Allagans. The Allagans went on a dragon hunt, killed Bahamut and captured Tiamat.
And the Ascians teached the Allagans how to capture primals and teached Tiamat how to bring back her dead lover as a primal. The rest is history.