Re: Episode of the Week: The Neutral Zone
was also a backdoor pilot. Roddenberry later did Genesis II, Planet Earth,
and The Questor Tapes.
Then there's Earth: Final Conflict.
So, I don't see that Roddenberry had an aversion to Earth stories.
“A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP” — Leonard Nimoy (1931-2015)