So it’s barking, it was supposed to be barking and you admit that it is unrealistic.The "lock em up or hang em" idea was (as mentioned) only feasible in a dictatorship where the only aim was to stop gun crime and with no worries about the rest of it.
Perhaps it could be done, but not the way you propose. It hasn’t been done anywhere with the same starting conditions as the US.It could be done, it has been done in other countries but it is a price that Americans are unwilling to pay and therefore they keep killing each other and cry crocodile tears over dead kids while at the same time telling other countries that they are doing it all wrong.
I doubt that the only way to address the problem is dictatorial fiat, so it is disingenuous to say that people are doing nothing if they aren’t following your self-confessed guano-insane scheme for inverting the basic principles on which a country was founded.