If the protagonist is straight, and the story doesn’t revolve around romance, then why is the protagonist straight in the first place if it’s largely irrelevant?

Oh wait, it’s like straight people are allowed to be more than romantic partners and can, gasp, have personalities beyond “who should I hook up with?”

Also see, “Wait you mean black people can be more than the sassy friend or the slang user,” and, “Oh wow fat people don’t just wonder when the next meal is or lament about not being beautiful enough to love?”