This seems like it misses the point. Obviously there are professional numerical analysts, statisticians, mathematical physicists, etc. who have sufficient background and interest to keep up with cutting edge research and do solid work in machine learning. The argument is not that everyone needs a CS degree per se, but rather that you shouldn’t have your excel guy who just went through a machine learning MOOC but has no further training or deeper understanding try to apply machine learning to life-or-death problems.