No worries. :-)

That is, I'm not seeing how increasing the probability that your victory equates with your own suicide is better than letting someone else just kill you. You're dead either way.

Say that value(you win) = +4, value(others win) = +2, value(all die) = 0. If you skimp on safety measures for yourself, you can increase your probability of winning relative to others, and this is worth some increased chance of killing everyone. Let me know if you want further clarification. :) The final endpoint of this process will be a Nash equilibrium, as discussed in "Racing to the Precipice," but what I described could be one step toward reaching that equilibrium.