The Jedi Order always implodes due to the council gradually becoming terrified that their knights will fall to the dark side and turning draconian. Someone rebels and takes the whole thing down, usually with Sith help. The survivors get a much healthier world view, then eventually rebuild the Order in a more enlightened manner. Then the Order decays and implodes again. The Jedi seem to be at their best as a philosophy rather than as an organization.
That seems to me like it's one of the themes of the series: the Jedi order, though it had good intentions, had lost its way due to overly rigid structures and beliefs, to the point where the Sith were able to take control of the Senate and Republic that the Jedi swore to protect right under their noses. And their rigidity ended up driving the chosen one to destroying them before destroying the Sith (though in actually just weakening both).
Dooku left the Jedi for a good reason. Palpatine wasn't the answer Dooku thought he was, but Dooku saw first-hand the evil that the Jedi were enabling and even enforcing since they didn't consider loyalty any deeper than "are they an elected leader?" and placed more importance on following rules than doing the right thing.
Maybe that's what we should get: yet another trilogy where they rebuild but without the attachment nonsense and other unhealthy jedi practices. Though I'm somewhat conflicted when writing 'yet another trilogy'.
If we follow a lore, they used to, but it became their undoing.
It's like having emotions with superpowers. Great when you have family to love and protect. Not great when they're cut down in front of you.
Going from super happy to super angry is quite the Sith move after all.
On top of that, star wars is essentially a sci-fi exploration the Tao Te Ching (one of the Taoist scriptures). Read any of it's verses and you'll immediately see the philosophy of the star wars franchise (as written by Lucas) come through.
The force is a fundamental in universe physical law, even more so than gravity. This means there are different laws and principles that people must follow. The force wants balance, which is another way of saying it does not want people to use it's power for their own will, redirecting it's path. It wants to flow in it's natural state undistrubed (a very Taoist concept). Emotional attachment tends to cause people in the star wars universe to use the force for themselves or those they love, which often disrupts the balance or flow of the force. Being able to feel the force is almost like losing at Russian roulette in a way, because it means you either fall to the dark side and have the force slowly kill you with dark side corruption, or you sever all ties and abdicate your life to the will of the force. It may be considered a cruel reality, but it's not the Jedi who created that reality.
I think it also may be Lucas's way of trying to convey the same thing Marvel did with Uncle Ben, telling young people that as they grow up with great power comes great responsibility, and that there are things in the universe much larger than us.
The emperor shillbots are out in full force again, today, I see. Hey idiot, maybe you'd fool us if you were capable of speaking in anything other than absolutes, ever think of that? /s