Don't know the Cook you're talking about, didn't hear his comments. I suppose we could compare the similarities and differences between their situations, but it doesn't really change Frost's assessment of the team he has assembled and coached, or the general standard of not blaming your players when you're stinging from a loss. That's where being a grown man comes in.
Prior to Nebraska, Bill Callahan became famous for calling his team, the Oakland Raiders, "the stupidest football team in America." He wasn't entirely wrong -- they were a stupid penalty machine -- but Callahan's career went downhill from there, and that is the only quote he'll be remembered for.