George Lucas:
“The Force is a perception of the reality that exists around us. You have to come to learn it. It’s not something you just get. It takes many, many years…Anyone who studied and worked hard could learn it. But you would have to do it on your own.”
These are the rules of the Star Wars universe. You don’t just get the Force and it takes many, many years of studying to master it. TLJ breaks those rules.
George broke his own rules when he started the prequels. The rules changed from “anyone who studied hard could learn it” to " only a select few, which the Jedi identify at a young age, can use the force".