That is indeed the problem. ALPA is controlled by the UAL and DAL pilots, which means they really don't GAF about stopping the whipsaw among the regional members of ALPA.

Let's follow your argument to it's conclusion and assume American votes in ALPA. The entrenched UAL and DAL pilots at national aren't exactly going to give up their elected positions without a fight, not with such a sweet gig they have made for themselves. Are you willing to let your national representation be led by pilots of other carriers that quite frankly would like nothing better than to see your company fail for their own personal benefit and company's market share? Remember, ALPA is an association (spit) not a union.

Just some food for thought.