I recall multiple therapists telling me precisely that, according to the research, people are less likely to accomplish or make progress on passion projects when they quit their jobs with that goal in mind. I have memories of finding papers on this, too. Now I can't find them, and I'm questioning the accuracy of my memory.

Disheartening and embarrassing, but probably healthy, too. Thanks for the reality check.

My speciality, you are are welcome.

I can only share anecdotically, that for me having 2 jobs did not worked out at all and I only started to make progress on my passion project once I quit all the other stuff. On the other hand money was tight and stress

So it probably depends, on the stress level of the ordinary job. If it is something that brings money but leaves you energy, it might be the better alternative to have more time but existential fear which blocks passion for me.