I guess a general application of statistics and control is going to be called ML then? If that's the world we're living in then I wonder how the missing fraction are being governed. Pure malice?
Not all applications of statistics/control are ML - I don't know what I said to give that impression.
A spam filter based on regex or manually-selected criteria and thresholds would not be ML for instance, whereas modern effective spam filters typically do make use of machine learning.
