It has been harder and harder every year, and frankly I'm really disheartened and demoralized these days. Articles like this one don't really surprise me anymore. It's not my department, but I feel complicit none-the-less.
But when I look out at the tech industry landscape, it is clear that I can do more good from within, because I have more freedom and influence on the work, and I believe that the work is net positive for the technology ecosystem.
Businesses large and small seem to have their heads on backwards here in Silicon Valley. Their founders are all highly profit-motivated, and don't truly seek to make the world a better place. Those that wear a facade of idealism give me no reason to believe they are any better than Google. If I left Google, where would I go where I can work without shame? I even have a hard time imagining starting my own business without falling prey to the same broken mechanics that brought us to where we are today.
At least at Google, I can say with confidence that there is ongoing work by people I trust - who in turn are given a lot of autonomy by the company - to make the world a better place with technology.