I think it's reasonable to be skeptical. There's a similar lack of evidence that it works out better for people who quit their toxic jobs when those jobs are also how people pay for the necessities of life.

I'm expecting to quit my job within the next month to try to build my own company. I live pretty frugally (though in an expensive city/country) and have at most a year of savings, if I completely wipe out my government retirement savings accounts.

If it doesn't work out, I could very well end up homeless or dead. But if I stay at my job I could also end up dead (whether by heart attack, suicide, or the rest of my life flying by in an unfulfilling haze of work).

This article resonates with me, but I'm also not going to pretend I know definitively that leaving the job is the better option for me.

(In my case, I wouldn't even say my job is toxic, just taxing)