Yeah, he has the right, sure. Nobody says he doesn't, nobody says he shouldn't. But right now it's in the media. It's stupid. Now there's more attention drawn to this, and if they lose (though Elon's musk will likely try to bleed them dry rather than try to straight up win) it's now not just a claim, it's a claim backed up by law. He has very little to gain with this stunt.
Time you've spent enjoying yourself is absolutely not time wasted.
I know what you mean, but keep in mind that you're comparing yourself to everyone that made it. There's over 6 billion people on earth, and you compare yourself to, what, 5 people? 10? 15?