Why do I get the feeling that you were one of the people who was upset when Captain Kirk kissed Lt. Uhura?
Ironically, Actress Nichelle Nichols, who played Uhura, wanted to leave the show because they weren't giving her enough to do. Dr. Martin Luther King talked her out of it, because it was a groundbreaking role, even a minor one.
25 years later, Star Trek Deep Space Nine premiered, with Avery Brooks- a black man - as the lead. My opinion, it was the best Trek show produced up to that point or since. It featured one of the first same sex kissed on TV.
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Today, you have Star Trek Discovery, which is generally an awful show, but it does include a Gender Fluid character as well as several gay characters.