yeah, I didn't know "families on starships" was specifically his idea, but if so, it was another goofy one. Think of major engagements like Wolf 359 or in some Dominion War battles.
Now try to picture families on ships during WWII at the Battle of Midway or Leyte Gulf.
I don't think the comparison is apt. The Enterprise
was originally envisioned to be going on a ten-year mission to unexplored space.
There aren't too many family people who are going to sign up to not see their spouses and off-spring for a full decade. If they had held to the original concept, there'd be no way to do it without families aboard.