Putin may not be the evil dictator the system portrays him as, but he's also not a 'saint'. He's not going to let someone attempt a coup/mutiny then not respond in kind. Live by the sword, die by the sword.
That’s an important point I think. I think everyone who lives by the sword has to expect to also die by it, including those military/Wagner people that traveled with Prig. I think that is somewhat of an explicit and sometimes implicit understanding everyone has who is living by the sword. When you join any type of military service and/or spy network you are living by the sword. Or, on the other hand, it is a whole different understanding and approach toward people who haven’t decided to live by the sword, including civilians. Putin likely views it in that way.