A>B>C Logic

[BenjerminGaye]

Not really, when you have confidence.. its not stupid at all actually. Minato should've let Kakashi kill Obito.. but he didn't .

That's not confidence that's stupidity.
Minato isn't letting obito power up. Different situation.
In fact obito was gonna die regardless since he got the juubi extracted from him.
Goku let freeza get stronger even though he was on a dying planet with no way to leave knowing full well that freeza can survive in space and that freeza is(at that time) the universe's greatest threat.