The made Yakuza guys have underlings who carry guns and do violence for them though with the understanding they are to do the time if caught, so in effect nothing has changed.

The criminals shooting at each other weekly where I live are all 18-25yr old drug delivery drivers working for established bosses they clearly aren't rational or else they'd realize a few thousand a week isn't worth life in prison. Plenty of these guys get caught but there doesn't seem to be any shortage of violent replacements.