And even back in the '80s they tried a black version of "The Odd Couple" with Ron Glass and Demond Wilson, who couldn't act his way out of a wet paper bag.
That said, there were "black" shows that weren't reboots of white shows that were good in their own right. Sanford and Son, Good Times and the Jeffersons were hits (yes, two were spin-offs of other shows, but they had their own story-lines).
Even lesser known shows like Grady and "That's My Mama" were watchable. Plus in-between shows like "Julia" and "What's Happening!" that weren't world-beaters but did what they set out to do. (Dihann Carroll was one classy lady, and a solid actress).
Plus there is the old custom of being able to make ethnic jokes if you are that ethnicity. Jackie Mason cracked great Jewish jokes, and "In Living Color" had fun with black ethnic jokes (I loved the "Hey Mon" skits).