“The rule went in place for TNG. Which is one of the reason TNG sucked so bad.”
Yes, Spock and McCoy’s “conflicts” made the original show.
“Shut up, Spock. We’re trying to save you.”
I suppose this beats Young Uhuru slobbering all over Young Spock all movie, anyway.
Of course the original trio were basically designed to embody Freudian psychiatry so they had to have conflict. For TNG though he opted for more of an “ages of man” model where Wesley was the wide eyed innocence of youth, Pickard the slightly burnt out wisdom of age and Riker the man in his wizened some but still with much to learn. Then everybody hated Wesley and that stung Gene, so he brought in the mean nasty Dr to try to replicate Kirk, Bones and Spock with Pickard, Data and Satan (or whatever her name was), but really just showed he didn’t really understand why the first show worked.