That's because you don't want to have a right to live. You're OK with your judiciary and executive being able to kill you with impunity. Civilized countries have all banned capital punishment, in many of them life is an unalienable right granted by the constitution. It is also in the Universal Declaration of Human Rights. I would like that you also gain the right to life in the future.
I don't know how to directly address your assertions about US capital punishment. It seems to me that you're addressing a totally different reality that what actually exists here.
To the other point, while I don't believe that capital punishment necessarily
must consist of the taking of the life of the criminal, I would not want to live in a society in which there were no capital-level punishment for capital crimes. Any such a society does not honor life and does not provide justice.
So if nations that are subordinate to the UDHR have no capital-level punishment, without hesitation I choose to continue live in the US under the Declaration of Independence and US Constitution, where capital punishment is administered to capital criminals; though as it is today, many states in the nation deal unjustly with their citizenry by not administering capital-level punishment for capital crimes.
Of course, a no-capital-punishment UDHR might work great in societies with contracted freedom.
What I lament is that the US has moved too far away from capital justice already. Please, no more!