Open source is a thing because it's the most rewarding path. The respect I earn giving my software away is worth a lot more than any money I could hope to earn selling it. It's not possible to sell software. I also don't want to be in the business of managing other people's personal data, and get regulated to death, which makes SaaS not an option. All the paths to making money on your own in software are packed with stress, sociopaths, and landmines with little hope of striking gold. Software by its nature wants to be free, and most of the ways that exist to change that feel unnatural to me. It's much better to just live frugally and build things you love that you give away. Maybe this isn't the way things should be. If we had a sane and just economic system, then maybe I'd be an entrepreneur. I'm simply following incentives, and express no opinion on what's best or how the system ought to be.
