The issue is taking engineers who likely NEVER signed up for military work ("that's not in my job description!") at your company and throwing them at military contracts. If Google wants to pursue this they should either hire experienced government contractors (who have the benefit of existing government clearance) or Alphabet should spin up (whether buy or create / fund) a government contractor focused on this sort of thing. It would likely yield better results given the types of resources Google has available. But don't just expect someone whose never done government work who might not want to to just roll over and do it if you force it upon them.

Disclaimer: I work as a government contractor unrelated to Google but I chose the type of company to work for based on the TYPE of work they do. If I don't wanna build kill drones I don't work for companies known to do weapons or related engineering.