What about gun-manuals? How about teaching people to drive? Teaching them to use a knife? Makeup classes? Wig instruction manuals? Zipping files with encryption? SSL?

The list goes on and on and on. All those things help criminals evade capture, or to commit some sort of crime. You've just drawn some arbitrary line (drivers education ok, tor setup advice bad) because you have absolutely no idea what makes one worse and the other not.