This is untrue. The hard sciences, as oppose to soft sciences, have more of a multi-disciplinary approach to learning. Your math helps your physics, your physics helps your chemistry, your chemistry helps your biology. This is a much better system than a degree such as economics or psychology, where the leading academics live in bubble of theory that isn't applicable in the real world. Out of all the degrees, STEM is by long and wide the most multi-disciplinary, taking elements from all of its components and using them in conjunction to reinforce one another. Any argument to the contrary would stem from a bitterness associated with those who don't take STEM but rather an arts degree, which comes from an inferiority complex that most arts people have towards stem people.