IDK - If you listen to interviews from DC Fontana (who ran the writers room - Star Trek: The Animated Series (on NBC in a Saturday Morning slot) ran from 1973-1975; did 26 half hour episodes that are honestly in line with what the live action series did from 1966-1969 - and she never considered it justa 'kids show' - although yes, kids watched it too.You ignore the fact that those aren't science fiction series. In fact, all your examples are comedies/sitcoms. I suspect most of the examples you might want to cite are either sitcoms or kid's shows...
Hell, larry Niven adapted one of his 'Tales of Known Space' short stories: "The Soft Weapon"
https://en.wikipedia.org/wiki/The_Soft_Weapon
into a ST:TAS episode that was aired entitled: "The Slaver Weapon"
https://en.wikipedia.org/wiki/The_Slaver_Weapon
PLUS - CBS was able to do Star Trek stories in under 30 minutes themselves:
https://en.wikipedia.org/wiki/Star_Trek:_Short_Treks
^^^
And they were so well ereceived CBSAA is doing 6 more 'Short Treks' to be released later this year.
So yeah, please drop the "Science Fiction and Star Trek stories CAN'T be done well with only 30 minutes..." bit as it's just plain not true.