why? lot's of good work came to Python by people who were sponsored by big tech companies. make Python better for them, and for a lot of other people too.
(sure, it's a bit different than contributing to CPython, but I'd argue not that different)
It is VERY different. One company now has complete control of the activities of the team developing these tools. Contributing to Python (money or time) gets you some influence, but doesn't allow you to dictate anything - there's still a team making the decisions.