ML is about function approximation where function can be anything and mostly something that is practically intractable by usual analytical or numerical methods,

ML is about function approximation where function can be anything and mostly something that is practically intractable by usual analytical or numerical methods, such as observing real-time processes with millions of variables. In math, via a reduction, human life is just a function of time with many inputs and many outputs. I.e. you can do curve fitting there as well...