An ambit claim, sure, but you can't manage what you can't measure
There probably aren't any figures. The rest of your comments were irrelevant to the legitimate point you raised.
What's relevant is that the lack of any figures for or against is one sign of a badly run not-for-profit organisation that cannot demonstrate whether its mission remains compelling and relevant to the public it serves/defends (since it has no "sales" to signal that).
This is typical of those dominated by a long-standing founder and another example of why organisations benefit from succession planning and constant leadership renewal.