I agree that we have no idea how it'll play out. But I've seen nothing but good faith from Charlie and others, and I see no reason to preemptively condemn their attempt to build a business.
In this case they are replacing Python code with Rust which might exclude large part of Python community from being able to contribute.
(Or another framing: only the tiniest fraction of the Python community was contributing to CQA tooling in the first place. It's not clear that prioritizing the interests of the 99.9% of Python programmers who -- rightfully! -- will never modify these tools makes sense.)