It creates yet another person who will come to rightfully hate the US, gets bad press affecting tourism and business, and for what? For a girl that loved the US, misinterpreted or misunderstood something and is staying a little longer, spending more money and having good experiences.
Enforce the law, sure, whatever, but the jumpsuit and 10 days in a detention center are barbaric and unnecessary. There's a reason this wouldn't have happened before a wannabe dictator was in power.