You dont remember correctly. Or rather, there is so much debate nowadays that no one remembers what Cannon is.

I was always of the understanding that the X wing was developed as a space superiority vehicle, but lost to the TIE fighter because the empire preferred cheap disposable fighters. And being tied to your mother ship because of no hyperdrive kinda puts a dampner on defecting and taking your gear with you, no?

The Rebels, on the otherhand being on the wrong end of that equation needed the X wing because its everthing the TIE was not... durable, multirole, and capable of extended operation away from bases.

I am certain, however, that we have passed into the territory of "we are investigating this WAY to closely" quite some time ago...