Others: downvotes don't fix what problems might be in myron's thoughts. They make them worse.

The expected value of attempting to fix myron's thoughts is not sufficiently high to warrant adopting it as a goal. In fact it is negative. This is due to the low probability of success and the negative externalities the attempt would produce.

Downvotes do help fix the problem of undesirable discussion being visible. In sufficient volume they would also have prevented later parts of this discussion entirely. It would have preempted the frustration that prompted "arrogant arsehole" labels and, indeed, tends to be more effective at making people "fuck off" than actually telling them to. Perhaps some voters simply saw the warning signs ahead of time?