To offer another analogy: If I work at a company which makes their money off pop up ads and I think that's unethical, so I pitch management on alternative revenue streams, then is my position suspect because I'm taking my paycheck from a shady ad tech company?

I think the analogy of preaching vegetarianism while eating meat is somewhere between preaching no-interventionalism while living in the country you were born in, and preaching non-interventionalism while personally bombing people on the other side of the world.