It is totally true. There are almost no, none, zip, zero climate scientists working in the private sector, or with independent funding. They're either government employees or in academia with a very high reliance on government funding. Or funding from a source with a political agenda (of either stripe).

That's true of many other disciplines as well, so in and of itself does not automatically invalidate anything, but it is something to consider before we take measures which will have drastic economic and societal consequences.