Why did Coinkite destroy its inventory?

The company published a note claiming they destroyed all their inventory (devices affected by the bug). Why? Why couldn’t they just reflash them with the fixed firmware? I can’t stop thinking there is something else to it. Should users of coldcard devices be concerned? They are being asked to upgrade firmware and be at peace of mind. Why didn’t Coinkite do 5he same? Could there be more we are not being told and involves a hardware-level bug?