If you read all reports, this isn't the big deal people think, nor is it a reflection on team discipline or the owner. They can do nothing but impose the fine...period.
Veterans often skip training camp altogether or for large chunks because they hate it, yet no one makes a big deal of it. Dez is Dez; enough said. Irving lives in California, so maybe he didn't see the point of flying to Texas just to catch the flight with the team back to California.
We don't have to agree with every goofy decision young guys make, but relax...camp hasn't even begun yet.