So let me get this straight.
It's totally reasonable to you that Luke would somehow figure out force push on his own without ever being told that the force could do ANYTHING like that (in ANH as far as I recall the force was basically entirely metaphysical, it helped guide his actions and obi-wan tricked minds, but had no physical impact)
But it's not reasonable that Rey figures out she could do a jedi mind trick after:
1. Knowing about jedi and all their powers for her entire life;
2. Getting confirmation from a living legend that everything she heard about the jedi, the force, and their powers are true;
3. Getting a live demonstration from Kylo Ren who was trying to get her to reveal the resistance base; and
4. It's established that your mental belief in the force trumps training in things like ESB
????
Quite literally the movie provides NUMEROUS reasons why she's able to do it and figure it out, while your defense of Luke is literally "even though it's never mentioned, referenced, or even implied, maybe he figured out force pull off screen?"
I mean come on, especially when force pull is literally in a different realm compared to what was previously seen in ANH.
Err no? In ESB it's literally shown that it's way more mental rather than necessarily constant training. It's very much treated in the same way as something like KI/monks in the real world, it's the idea of mind over body.
They reason they train is because the repetition of the difficult training helps refine and strengthen their will. When Yoda is teaching Luke, Yoda asks him to lift the X-Wing. Under your logic, Yoda is being a huge asshole because Luke has only been training for a short time and is coming from a place where he could barely move a lightsaber, and there would be no way for Luke to succeed at the time.
But that's not the case, Luke fails, and tells Yoda that it's impossible to lift because it's too heavy. The Reply?
Luke didn't fail because he didn't train hard enough, or wasn't trained enough, he failed because he didn't BELIEVE that he could do it.
Which they did with about 4 times as many reasons compared to Luke pulling the lightsaber.
Nah, no way Disney removes them from the canon while keeping the prequels, and especially not when one is the second Best Star Wars movie since Empire.