Actually, it very much is a valid reason.
The hubris of those who believe other people should be forced to release their (not already subject to a copyleft license) work is the very antithesis of FOSS principles.
The hubris of those who believe other people should be forced to release their (not already subject to a copyleft license) work is the very antithesis of FOSS principles.
Now if this isn't actually the case and they're just using it as an excuse because they don't want to release it, and they want to continue playing this cat-and-mouse game with leakers and ROM sites forever, that's fine too, it's a little disappointing, but my intention is to present the idea that there is a different way.