[username90]

Could a person with ML experience come up with this solution? Yes! Would his ML experience help him come up with this solution compared to someone who just learned numerical methods and automatic control theory? No. This isn't an ML solution.

Just because something is taught in an ML course doesn't mean that it is ML. It is pretty common for physics classes to teach maths and for chemistry classes to teach physics for example.

So if something is taught in ML class but also in statistics class then it is statistics and not ML. If something is taught in ML class but also in a numerical methods class then it is numerical methods and not ML.