Have you ever maintained a large open source project? It is so, so far removed from the pure "just creating for the sake of software" idea. It is a job. It can exhausting, frustrating, boring, tedious, etc... you trade your nights and weekends for... the creative spirit? The joy of creating?
People talk about OSS like /r/choosingbeggers. "Why would I pay you for art? You should do it because it's your passion"
To be honest, I still love open source, but I have to take long breaks from maintenance because the "work" side of it -- the tedious zero effort issues opened, just gets to be demoralizing. The next large project will be closed source. I'm getting too old and grumpy to do project maintenance for free.