So, how would the US defend itself against countries like China and Russia if no one built weapons? Everyone agrees weapons can be used in ethically horrendous ways. It doesn't follow from that, that the US doesn't need a weapons industry.
YC doesn't need to be funding the weapons industry; they're already filthy rich. This shows their greed outweighs any moral quandries around building machines of death.
So, how would the US defend itself against countries like China and Russia if no one built weapons? Everyone agrees weapons can be used in ethically horrendous ways. It doesn't follow from that, that the US doesn't need a weapons industry.