There's a bit of a fudge there - you think Luigi should face judgement for his actions but are not comfortable with deciding the Dave has to play by the same rules as Goliath - he shot someone in cold blood in the street. You're not comfortable with deciding that's an unacceptable way to resolve a dispute with a healthcare company?
You want Goliath to change the rules for healthcare - absolutely no doubt that the US healthcare system is horribly broken and this man made decisions that led to the death of people who had paid into insurance schemes.
But - there is no perfect healthcare scheme that can pay out for every single health claim. There will always be people denied healthcare (as there is on the NHS - NICE has to approve medications so there are lots that are simply unavailable to patients in England). This healthcare could improve their quality of life, or extend it and they will obviously be devastated not to receive it. Are you still not comfortable with deciding whether it's ok to shoot the CEO of the improved healthcare company because it is still denying some claims?