While I think your 2 examples are too drastic to be equivalent, I see your point.
Let's go down that road though:
The DH rule is like...
if the Eastern Conference had a 35 second shot clock and the Western Conference had the 24 second shot clock.
???
If the Eastern Conference allowed dunking and the Western Conference did not.
???
Fair enough, it is the WS where I think there is a proble with different rules.