Sure, lets be the guinea pig and sacrifice one's life for the sake of some hypothetical improvement that will happen by one's death. Since other folks have died on the NY subway and nothing has changed, I doubt one's sacrifice will do anything.
Maybe the leadership of the city should daily take the NY subway - without their personal security. And then write a bond of guarantee for the public.
Far more people are injured or die on the highway outside my office in Texas than in the subways of NY, and there's fewer people riding on the highway.
Actually a bong guarantee is a good idea, if the city had to pay damages every time someone in a victim of crime a subway, things might be solved quickly.
You are describing tragedy of individual action. Similar story to protesting in Russia. Or using a bicycle instead of a car. Or perhaps climate change, and a few others
Maybe the leadership of the city should daily take the NY subway - without their personal security. And then write a bond of guarantee for the public.