I agree with your current take on the way bitcoin is used and distributed, absolutely "trust" in organizations are higher in "developed" markets, so custodial use or non-use is high.
I am in South Africa so see what a failed organisation does for example, we have high crime rates here, our police are corrupt, incompetent nd understaffed, so we have the biggest private security market per capita in the world. It's a natural reaction to market demand
We don't have major gun adoption here on the private level so walls, electric fences, gated communities, and 24-hour security have filled that demand. If guns were widely adopted you'd see those industries shrink.
So I see bitcoin as something that actively seeks out the worst environments like it's not valued as much in a non-custodial form in "trusted" communities, it gets a premium in places with conflict, as that capital flows in there, makes people richer, and they can then develop methods of safety that work for them (as I mentioned in the example above)
We see bitcoin flow out to somewhere else, it's like a pioneer species that is actively looking to raise people's living standards. Will the world ever be free of issues? I doubt it, not in my lifetime, I can't speak for lifetimes after mine though.