That's very interesting, because my students say the same thing. (I'm a design teacher, not a math teacher, but it still gets discussed) These online gurus are convincing thousands of teens that they're going to do this and teens are getting fed into a sales funnel of courses and books that will leave them broke. Your student doesn't understand margins, market saturation, first mover advantage, or any of the reasons why there is no more money left to be made in dropshipping.