It wasn't that long ago that big tech controlled most software....as entirely closed-source. And that's still largely the case: the source for Google's search algorithms, Facebook's core platform, etc. While it's good to be mindful that some projects are "controlled" by large tech companies, it's a huge improvement over the way it used to be. I'd rather see FB open-source React, Google open-source TensorFlow, etc. th…
Indeed, and the benefit of Open Source is that if the company takes a project in a direction that people aren't happy with (or abandons it) it can be forked.
In fact it could be argued that these companies only control these projects because the community allows them to.