Nobody said anything about surviving? These are people who worked for years building a career that means something to them.
What you said wasn’t incorrect, but it is about as useful as telling someone “just learn to code!” with an added layer of moral superiority

It’s also worth noting that most jobs you work are going to be for a corporation of some kind that ultimately has some kind of negative impact on the world in some way. Should they quit making music and go work for Amazon instead? What if that’s the only job they can get? Maybe they don’t work for Amazon but they work somewhere, contribute to pollution every day, and work for an employer that lobbies for billionaire interests or uses materials that were sourced from horrible working conditions or flat out slave labor. On that note, is your phone ethically sourced? Your shoes? All your clothes? You’re sure you haven’t contributed to sweat shops by buying from the wrong sources?

It’s difficult to exist in this world and make money while having zero negative impact, and not making money isn’t an option for the vast majority of people. I think when you really think about it you’ll see that you almost certainly engage and support in ideas you don’t support, just by accident as a consequence of living, and leaving x isn’t a solution for everything that you think it is.

Of course it's real easy to make this statement when it's someone else making the sacrifice.