If you possess legislative powers (which no single person actually does) then sure, you can decriminalize murder and make it a non-criminal offence. But why? Y

If you possess legislative powers (which no single person actually does) then sure, you can decriminalize murder and make it a non-criminal offence. But why? You lose your presumption of innocence, you lose a guaranteed defence attorney, and you still face years of prison and maybe even the chair... there is a reason why offences with gravest punishments (that is, crimes) have pretty strict procedures and proof requirements set up around them.