It's antithetical to a learn-by-use modality implied desirable by the OP.
There is nothing in the OP that implies the desire for characters to "learn by by use". There's a statement that there's a desire to cover the full breadth of Jedi training, from youngling through master. I think you're reading too much into the OP.
Not that I'd worry about the youngling stage, myself, but to each their own.
None of the official ones actually support a learn by use modality,
Few games do. That's because that design has its own flaws.
In an all jedi game, when the non-jedi are no threat
Stop right there. You're engaging in a massive overstatement. Truly massive, really.
That we might find some issues with the balance of jedi classes compared to others does *NOT* say, "Jedi are no threat". It says that PCs of similar level won't be balanced - so that Jedi will tend to outshine other PCs of the same level in play. It is still an easy task for a GM to create non-Jedi antagonists who are threats and challenges to Jedi PCs. In SWSE, Jedi are by no means invulnerable superpeople.
If nothing else, Jedi can and will be overcome by sheer numbers. You can only deflect so many blaster bolts a turn.
then the jedi should be in charge of everything. Which at no published point in the setting, legends nor cannon, is that the standard. Hence, the comment above about misjudgement.
And now we get into the difference between game rules, and fictional world realities.
I've seen this form of argument before, that temporal control would align with personal combat prowess or other game-rule measure of power, but that's a naive analysis that doesn't hold up. Human socio-political control systems don't actually work that way. The strong dominate the weak only holds in small social groups - once exertion of power requires orders be carried out at a distance, by someone who has never met you personally, your personal mechanical power doesn't play so much a role. Other social control systems not managed by the rules come into play.
The Jedi have a Code. Part of being a Jedi is being a *servant* of the people, not a master. There is a social and hierarchical control in place - any Jedi who breaks those vows is going to have the rest of the Order come down on them (and this happens several times in the EU, whenever a Jedi slips to the Dark Side, for example).
As for it never happening.... guess what, when two people with equivalent power (Sith) get it in their heads to take control... Gosh o golly, they *do* control everything for a while - they become the Emperor and Darth Vader!
So, I fail to see how the systems are inconsistent with the fiction as presented.
