Hello,
That's interesting, as I had a very similar experience a few years ago, when I also tried to tackle the issue of the lending rate, at my local credit union, and got an equally frosty response, from most of my fellow directors.
I just couldn't understand why they firmly believed that they'd be able to safely grow the loan book, at the level needed, without moving from their traditional 12.68% APR.
Like you, I presented a survey of alternative lenders and their rates, drilled home the point about the additional cost to Borrowers, when the CU insisted on a conservative share to loan ratio with shares held as security etc.
I finally got some level of acceptance from them, when I pointed out that the people most likely to borrow at the high rate, were higher risk borrowers, who were unable to borrow elsewhere - and that this in turn, increased the risk of default, with greater potential for loan loss.
In the end, I gave up banging my head against a brick wall, and like you, didn't stand for re-election, after my 3 year term ended. The loan book continued to shrink and the CU was subsequently taken over (oh, eh, sorry... it "merged" with another bigger CU).
I had also been promoting the concept of the credit union essentially demutualising, selling its loan book, and distributing its net assets to its members, but the majority of my fellow directors thought that was a terrible idea - and that it was a far better idea to simply give away our members assets to another CU, that had no connection with our community, and would most likely just asset strip our little CU.