I think I understand what you're saying, but I don't think that's reason to _not_ try to have decent discussions about politics when it relates to technology.
HN already has systems in place which make people pause before replying consecutively, which goes a long way to discouraging flame wars.
In any case, politics doesn't need to be about enforcing a point of view - it's about exploring options.
Net neutrality is almost completely political - should discussion about this be killed?
Copyright legislation is almost completely political - should this be killed too??
Limiting discussion to things which feel 'safe' isn't constructive imo.