What, precisely, do you mean by "professional", and how is the Python team not being "professional" right now? Because the definition of "professional" I use is "Doing something for money, as a profession", with no implications about the quality of the work, and that's obviously not what you mean by it... right?

If the governance of an open source project is bad enough, the way to fix it is to get a group of people together to maintain a fork. (Companies that depend on open source software can and will maintain their own branches.)