You can hammer around the statistics until the cows come home to argue that flying is less dangerous than any other form of transport. (BNC)
However, this approach may not always be the most successful one because it is so familiar to most of us, and in a competitive situation people are able to go on reasoning until the cows come home. (BNC)
We could talk about this problem until the cows come home, but it wouldn´t solve anything. (Google)