For what it's worth I think the most important thing in your toolkit is your head.
For some people what's a showstopper is a minor irritant to others, or maybe even a challenge!
Nothing wrong with being prepared and figuring out what might happen.
My unusual failure was the pin holding the saddle snapped, leaving me with no place to sit. An overnight storm didn't help, but the next morning I was dragged into a farm on the side of the road and every box of old nuts and bolts were rummaged through until we could improvise something that would work. That was in Italy where I don't speak the language and they didn't speak mine.
If you read the first book my Anne Mustoe it'll amaze you. A retired schoolteacher sets off to ride around the world in the mid 80's unable to (and not intending to learn!) how to change a puncture! And she did it!
Don't overthink it.
Hope for the best.
Expect the worst.
Deal with what you get.