I'm not sure if I really buy most if not all of these arguments, especially the security one. Haven't we already established security through obscurity doesn't

I'm not sure if I really buy most if not all of these arguments, especially the security one. Haven't we already established security through obscurity doesn't work that well? Ultimately, a simple "because I don't want to and I don't want people to copy me, thus I'm not making it trivial" would have been enough.