>to have an impact you must have courage to say no to the vast majority of social issues you could care about, and then commit deeply to the ones you decide to work on.
I strongly agree, but sadly I think what you're saying here is probably almost incomprehensible to a broad swathe of middle-class white Americans, to whom being seen to be outwardly supportive of every DEI-ish cause has essentially become something like personal hygiene -- a thing you do perfunctorily and without thinking. It's just "what you do", "what a civilised person does", etc.
I'd be interested to hear more about what you have seen work and not work for economic development in these communities.