I'm not sure I understand how that hurt actually takes place. These companies are essentially acting as charities, donating a portion of their profits to reduce the cost of a tech education. Some people who might not have been able to pursue education in tech are now able to. Do those people not benefit? Do the companies not benefit? Then how is society harmed? Would society really be better off if these companies remitted that money to shareholders as dividends, as is their right?

It seems to me that the complaint begins and ends with the assumption that if something is good for a big corporation then it must be bad for society at large, and vice versa.