Additionally, the use of the force by Leia and Luke and even Rey is placed as a plot hole filler. Does not follow any logic. Being savant with the force does not grant you anything without a minimum of training. Anakin and Luke did need training to move things and do Jedi tricks. Kyle Katarn needed training too.
No, that was a lesson that Luke had to teach Rey about himself. Although, that does actually add nicely to the lesson that the Jedi Order's downfall was because of it's own hubris. Which is true. The Jedi always taught that the darkness was a danger and emotion should be avoided, but this like many things the Jedi thought was not entirely true as it isn't an absolute. I think Luke was still caught up in the belief that it was during that lesson.