It sounds pretty good until you realise that it is the peak of open source full time job. And survivorship bias is taking place here.

Evan took a huge leap of faith when he quit his job for working full time on vue. I am happy that it has worked out well for him.

But it does not mean this path will work for other open source developers, of course they can still get corporate backing(node.js) or paid to work on it (react/angular) or make a business offering around it (laravel/tailwind)

This road is very less travelled.