And here is where your narrative falls apart. Just because Luke decides to end the Jedi and be all non violent and such, does not in any way translate to the sith or those who wish to be evil from doing the same.
Righteous violence has always, always been used to counter malicious violence, even if it's as small as tackling and subduing someone beating someone or something defenseless, or as large as war. Violence can beget more violence, but most often it does the opposite if the counter violence was used for a greater good. The worst war in human history was not resolved by diplomacy, non violence, or anything wishy washy. It was resolved through brute naked violence, overwhelming violence, nuclear bomb violence. It did not lead to more violence. It did not beget more violence, and if it did, the level of violence paled in comparison.
Yet we think the opposite? We believe that the USA using overwhelming and at times outright cruel violence only made the world worse off? That America should have simply left Europe and the world to it's plight and it would've led to peace? That's some strong self delusion.
The movie had every reason, every obligation to present a third way for many reasons but the most obvious being a retread of Jedi vs Sith was running out of gas. This absurd suggestion that Luke HAD to end the Jedi because they were creating a cycle of violence makes as much sense as the suggestion that rich people don't care who is in charge because, apparently, having entire planets blown up and entire markets destroyed is good business because they might sell a few more x wings...nope. The Jedi only used violence when it was the only other option. Sitting on the sidelines accomplishes nothing and it's not like we don't have a saying about when good men (people) do nothing.
And gee golly wiz, by sitting on the sidelines and ending the Jedi we found peace. And by peace I mean Kylo Ren murders people he cares about, the First Order murders billions, and the only resistance to them was nearly wiped out. Pretending Luke is that kind of stupid and delusional is insulting.