This article is a remarkable expression of privilege.
It assumes:
1. You can find another job without risking your home or you or your family's health.
2. You want to be the kind of person who goes above and beyond.
3. You don't have family.
4. You don't have a boss demanding that you are on call constantly.
5. You are immune to burnout.
But 1. is the biggest. In the U.S., quitting one's job without another job lined up leaves you unable to access healthcare.
You're a wealthy consultant. Understand that most people live paycheck to paycheck. Understand that many of us have chronic conditions that require we have health insurance.
If people refusing to be on call 24/7 is a "crisis" for your organization, then maybe, just maybe you don't have enough staff.
The attitude that anyone in a bad job can just immediately find a better one doesn't get anything fixed...because somebody is still going to be stuck with a boss who says "Here's your 8 hours of work for the day" at 5pm and "If I find your resume posted on the internet you're fired." I am not making that up. I know somebody it happened to, and it took them over a year to get out of that job....being fired would have resulted in eviction and it's hard to look for a better job when you have to do so in complete secrecy AND are spending every waking hour commuting to work, working, eating lunch at your desk, eating dinner at your desk, commuting home.
Quiet quitting is simply saying "No more. I refuse to put work at 100% and everything else including my health at less than 0%."
Also, you imply that in the right job, you should be willing to work and be on call all the time.
It's unhealthy. The person you're complaining about here, Jacob, was probably burned out and having a mental health crisis from doing that. I hope you don't end up there yourself.