While you may have never seen a thread about, many things happen in this hobby that are not on the internet. With that said, I have never killed a snake by assisting, but it is possible. I have seen someone loose control of some hemostats and poke them right through the neck of the snake from the inside. The snake healed, but there were some serious risks of infection there.
I don't believe abyone is trying to insult you, or tell you that you did wrong. I think there are many things that can be done with snakes that stray from the norm, but having all of the issues and consequences for actions up front, help for making more informed decisions.