It's not that both are wrong, you misunderstood the movie completely, both are correct, it's just a case of Jedi had formed a robe wearing good guy cult utilizing the powers that they could understand and how to "use the force" to achieve their goals, Sith understood enough to utilize the energies and flow of the universe to gain themselves power and abilities over others who didn't understand it. Both were correct in what they understood of it and as per the prequel trilogy we see that both sides very much were capable of making disastrous mistakes with what they believed to be true.
While the Sith appear as evil because they turned away people who they didn't deem powerful enough to learn their ways.... so did the Jedi but based on different factors such as blood tests for what they thought made people more connected with the force.
Both Catholics and Protestants could be correct about the afterlife but equally both will likely have some aspects of it wrong (if they've any correct at all) but just because how they believe in a God is different slightly, doesn't make the God they both believe in to be untrue, just that they're both looking at the same thing from two sides of view.
That's what I took TLJ to be telling us, that basically Jedi teachings are just a way of using the force for good... but Jedi is just a name for a religion who got stuff wrong, same as all religious groups, that while they were right in ways, they were wrong in others and also just right on a little part of a bigger picture which they didn't fully understand.
That's fair enough, but what now? There are no rules. Theres no lineage anymore. All future movies and stories will just be a small dent in a vast universe. Good guy loses? So what? Another person will be given the force and continue the fight until good wins. Your father was a jedi? So what? Your neighbor might be more powerful than you. I just think they opened the door too much. But maybe it was already wide open for all I know. I haven't read every Star Wars story.
He said it is what gives a Jedi his power, but he never said that the Force is something which only exists for use by the Jedi, you could say that the Sun gives a tree the energy it needs to grow... but that same Sun also helps all living things on the planet grow and exist.
I sort of rather it being opened up to allow others to utilize the force, but it's not like it wasn't in the Star Wars movies where someone would have a huge connection with the force but the Jedi not want to take them on board and just hope they lived their lives free of getting involved in the Jedi/Sith war, remember, the Jedi council did not want to train Anakin because he was deemed too old by the time they discovered him, what would they have wanted his life to be? Just lived out as a street urchin who was massively connected to the force which they trained to get as close to as possible.
