You demonstrably have not.
So, you're claiming that the T-16 is similar to the X-Wing? I assume you're citing to Wookieepedia as your source for that? Because otherwise, it's clearly in a different category of vehicle, which would be akin to saying "If you can fly a plane, you can fly a spaceship."
Actually, that's not the case at all. That's because you're missing a critical link in the argument, which Wookieepedia provides.
You claim "Luke had training as a pilot." I and others have pointed out that, in fact, he didn't have any such training
in an X-wing. You cited to Wookieepedia to prove that his training in the T-16 allowed him to understand how to fly the X-wing, which is the critical link. That's the only thing that lets you make the leap from accepting that Luke's ability to fly an airspeeder translates into his ability to fly a starship. You're the one who cited to Wookieepedia to support your argument. Keep that in mind.
Neither did Luke.
Luke gave the audience literally no instances of piloting prior to actually flying the X-wing. He
talked about it, but he didn't actually
do it. Moreover, he
talked about being able to fly one type of ship -- his T-16. Of course, a T-16 isn't an X-wing, which is why you needed to cite to the Wookieepedia article that points out the similar controls. Even then, even if we accept that Luke
talking about flying his T-16 is enough to suggest that he can, that's still the same as Rey.
Rey, too,
talked about being a pilot prior to flying the Falcon. As they run towards the ship, Rey says she's a pilot.
Again, it's a double standard to claim that Luke
talking about being able to fly is what makes it reasonable that he's able to do so, but Rey
talking about being able to fly is not.
It's also a double standard that the info on Wookieepedia is acceptable to justify Luke's abilities as a pilot, but not Rey's. You still haven't addressed that. Her Wookieepedia page explains that she trained to become a pilot by using a simulator. WE don't know what ships she trained with, although the page references her actually flying another type of freighter.
Cool. So, now we're going with just what's in the movie? No more Wookieepedia? I'm game to use those terms.
Luke never flies anything other than an X-wing on screen in ANH. He talks about being a pilot, but we don't actually see him do it until he's in the cockpit of the X-wing. That, to you, is "earned" ability. Ok. There's our standard, right? Talking about your ability is enough to prove that you've "earned" it and keep you from being a Mary Sue? Fine.
https://www.youtube.com/watch?v=bdEzeKdHtcU
"We need a pilot!"
"We've got one!"
"You?!"
And then she flies the ****ing ship.
One standard. Consistently applied. Luke and Rey are the same. Both Mary Sues, or both with earned abilities. I'll let you pick which it is.