Apples and oranges? Pot calling the kettle black? Space western vs. space opera? TV budget vs. film budget? There’s no denying that Star Wars is derivative of many things, but Trek doesn’t even makes the top ten.
Still, you can’t really blame the guy for being partisan to his own franchise. (Or wanting Kirk to run off with Leia)
EDIT: And speaking of derivative, Heilemann has something of a point about Trek and Forbidden Planet.