"The WA border should have been opened by now freely to many states."
that's fine ------------- that's opinion - the point is that if it is unconstitutional - then, ok - it's fine for Morrison to take a principled stand -----
but, if that is the case - then - it is NOT fine to withdraw ----------- for those reasons stated
if they said ------------'ok, we now believe that it is constitutional' - then that would be fine to withdraw - or and to support the WA government
what is NOT fine - is to withdraw - still thinking that it's unconstitutional
if you thought it so important to challenge on principle - you don't stop because some people think you stink