It doesn't matter. The company doesn't need to justify their reasons for having a particular dress code. If the interns placed so much stock in what they were

It doesn't matter. The company doesn't need to justify their reasons for having a particular dress code. If the interns placed so much stock in what they were required to wear during their internship, they should have asked about it during the interview, and withdrew themselves from consideration upon learning of the dress code. But no, they felt that the company should change its policies to suit them. Because they're that darn special.