Ok.
Posit 1: Only white people (with nearly zero exceptions) write Star Trek novels.
Posit 2: You don't care about posit 1; you only want the best stories.
Conclusion: one of the following things must be true:
A - you think that minorities write worse stories. Which is racist.
B - you think minority writers would write good Star Trek stories too, but they haven't been. Ok, so why is that? Well, either they don't want to, which means that something about the work itself is racist (something that, as a Star Trek fan, should bother you), or they do want to but something has been happening to systematically exclude minority writers who would write those stories. Which means the industry / hiring process / commissioning process / etc is racist, which should bother you.
Either way, when you post that statement, you are either saying "I'm racist" or you are saying "something about Star Trek publishing is racist, but I don't care"... which is also saying something racist. It's a silly thing to say, and a Star Trek fan should know better.