alt Hacker NewsGoogle contributed tons of developer hours for things like bug fixes, without which the project might not be where it is today.
There are examples of foundations or other similar entities paying developers, like Linux, SQLite, even Zig.
Maybe the difference is some projects rely on core contributors more because external contributions are more restricted in some way.
But sure, the entire open source model doesn't work, lol
There's a wide gap between the arguments "the open source model doesn't work" and "the open source model failed to produce anything as good as uv after a couple decades of python tooling churn". The latter is why people are understandably unsure of where things go from here.