Well-off devs like the guy who quit Amazon don't have $$$ issues, so he can afford to do that.
Others don't, and that doesn't make them bad.
That makes them care for their family first.
That was the entire point. He addressed your concern in the first two paragraphs.
And it’s not just a perceived fear. The data shows that if you’re not in the portion of people increasing their rate of income/wealth growth, then you’re in the portion that is decreasing in income/wealth growth, and that compounds for your kids.
I would want a few hundred thousand in passive income before I would say I had FU money, which also means a few million in diversified assets other than my house. Especially in the US, where quality healthcare is a minimum $20k per year for a family in insurance premiums alone plus a few ten thousands in out of pocket costs.
You're right, you're not secure from all possible reductions in peak earnings. You may sacrifice some potential income and future wealth by switching jobs. There will always be richer neighbourhoods & schools, so that may mean risking a sacrifice in future lifestyle. But that's not the kind of risk that the article is talking about.
Most people can't leave their jobs because if they do so then they immediately risk not making rent, not feeding themselves/their families, or losing healthcare entirely. In practice, that means they really do have no choice: very few people will give up food for the greater good, and it's not reasonable to expect them to.
Successful programmers are not in that position though. You absolutely have a choice. The choice you're describing is between optimizing for peak wealth or trading a small part of that wealth for the greater good, at no substantial cost to your lifestyle. If greater personal wealth is always more valuable to you than any greater good then perhaps this doesn't feel like a choice either, but you're well past most people's line for reasonably ethical behaviour at that point.
I personally wouldn’t do it without talking things over with mine but if I felt strongly about leaving a job on ethical grounds I’m pretty sure my family would support that decision. You are after all just another member of the family that also needs support.
To be clear, we're not talking about risking food & shelter here. We're talking about risking one fewer skiing holiday a year, or buying the house with the slightly smaller swimming pool.
Building tools for mass surveillance, undermining employment regulations worldwide, addicting people to abusive tech, exploiting warehouse workers, breaking the law, propping up authoritarian governments. There's nothing you can think of that you'd put above your family's luxuries?
Grouping together millionaires with software developers working at Google doesn't make sense to me.
This whole debate is about drawing a line in the sand about morality that is convenient for the author. The same exact arguments could be made for any number of things anybody does every single day.