Sometimes saying "Yes" or "No" is the difference between having a job the next day or being unemployed. It would be different if everyone was declining unethical development, but there is surely someone to replace you. 3 months without work can really crush people - especially those who have a family to support with no safety net.
This isn't always about role models and being upstanding citizens. A lot of us in this field are fortunate enough to be able to decline work based on ethical stances. Anyone can say no. Can they afford the consequences?
Any engineer working for Google or Facebook can go get another job tomorrow. Maybe it won't pay quite as much, but it will still pay very very well in absolute terms.
If the "consequence" of making ethical career choices is you earn only $250,000/year instead of $300,000/year, you should probably reflect on why you value your soul so cheaply.
Not everyone works for Google, Facebook, or a prestigious tech company. There are smaller companies making ethically questionable choices with customer data. Not all tech workers are employed by prestigious tech companies.
Personal attacks will get you banned on HN. We've had to ask you to follow the site guidelines more than once before. Would you please review https://news.ycombinator.com/newsguidelines.html and stick to the rules when posting here?
This isn't always about role models and being upstanding citizens. A lot of us in this field are fortunate enough to be able to decline work based on ethical stances. Anyone can say no. Can they afford the consequences?