You're really missing an important factor of software development which is making things accessible to all walks of life. I simply prefer open source because it doesn't exclude specific classes of people because of money. Imagine a future where only rich people and those from wealthy families get access to the good development tools to help them get richer, while poor developers and those not from a wealthy family struggle to even get access to basic tooling, or have to exchange their personal information and rights in exchange.

Fortunately, many people in software are not simply money worshipers and envision a future where money isn't the priority in building a better world.