"Most stories don't have that kind of a moment" They do. The reason it happens over and over again is because the price they pay for getting what they want will change what they want. It happens a lot, gaining importance until the final act where they're sure they want this thing and they get it.
For the "returning to what is familiar to them" it's similar to the return home in the hero's journey. It's used to highlight how far the character's come because back with a familiar élément you can contrast to see what's changed. Zuko does go back to the fire nation that's been his home for most of his life, but changes it for the better. Shrek goes back to the swamp with friends, etc...
I think instead of just looking at the craft tips you're given and questioning them on the surface, try understanding what those tips are getting at. Usually craft tips are giving you some slightly easier to grasp examples of using contrast to highlight change, creating conflict to get tension in the story, give readers a reason to feel something about your characters, etc...
The specifics of craft book structure will not apply to every story, but the spirit will, so you need to work to understand the spirit of the tip and apply it to your story.
To apply the therefore/but idea to what you've said you need to boil down to core motivations and essentials.
- Heiroe is told a fundalental lie that his life has a purpose (presumably to kill Bad guy) by the king who he trusts
SO
- He mistrusts his family and other people generally and feels a loss of purpose. (Feeling bad for everything done wrong doesn't immediately track with feeling betrayed).
BUT
- BIG BAD that he thought he was supposed to beat is making people suffer
SO
- He finds a new purpose in life to find the "real chosen one"
SO
- He has to learn to trust others because this is a task he can't do alone
SO
- While growing as a person he gains new friends and New values in his life and no longer feels guilt for not achieving the King's impossible standards
SO
- With the help of the team he finds the actual chosen one (what he wanted)
BUT
- Chosen one doesn't want to do it? / Turns out Heiroe was rhe chosen one all along? / Finding the chosen one reawakens some jealousy or mental anguish from the King's betrayal? →MORE CONFLICT
SO
- The team have to find a way to convince the chosen one to come with them / get Heiroe to be good enough to fight big bad / get chosen one where he needs to go while dealing with Heiroe's emotional crisis
Etc etc ..
Side-note but IMO this seems like a parody name even when I read your first few pages... Especially as you've got a chosen one story which are very overused tropes therefore they're often used for laughs and genre satire. Like yeah he's the heir and the hero but it seems really on the nose, like if a secretly traitor character was called Liar McBad. The names of all the characters all come in to make the story feel really generic. I get some japanese anime do this but it's usually in a foreign language for the intended primary audience and also actually gags (Dragon ball comes to mind). Aang is not called "Saayvior" and Zuko isn't called "Firebad".
I accidentally hit send half way through don't mind me