The biggest reason is because union laws would force other people to join the union, if it got established.
I believe that you should be able to join whatever professional organization that you want.
But the moment that you try and force me to join that professional organization, with legal provisions that would cause me to lose my job if I refuse, is the moment that I go to war against you.
I will retaliate. I will fight back. Because I no longer have any sympathy for you, if you are going to cause me to lose my job because I refused to join your special club.
I believe that you should be able to join whatever professional organization that you want.
But the moment that you try and force me to join that professional organization, with legal provisions that would cause me to lose my job if I refuse, is the moment that I go to war against you.
I will retaliate. I will fight back. Because I no longer have any sympathy for you, if you are going to cause me to lose my job because I refused to join your special club.