Not really. Fast (immutable) settlement is terrible for humans. Self custody is more or less incompatible with our modern world. And despite that, there are ways to do both without crypto—hand someone stacks of cash and keep gold in a safe under the floorboard. Both of these options exist.
You are repeating the same false dichotomy by stating again that final settlement and self custody are bad defaults for the entire world. That isn't want I'm saying, I am saying a choice is better than no choice at all. I'm also not saying anything about crypto. Gold and cash are also useful instruments that should be financial instruments for everyone also.