Art De La Guerre

[Hazelbark]

I see your point. But you are assuming the unit conforming knows the future.
At the time the original unit conforms and completes its action it is in melee to its front and flank.
It is done.
It has followed the rules and fully complied. It has no more options.
Now the action shifts to the opposing player to make a voluntary choice.
It is the action of the enemy that changes the match up.

Your argument also ignores the time of conformation for this unit in this turn has passed.
My long line is not a red herring. Not even a pickled herring. You would allow more than one conformation.