Ok so you aren't convinced wrong gaskets will cause any problems.
If I am correct in my assumption. Why would manufacturers go to all the trouble of making different gaskets for the same transmission?
In fact why have any gaskets at all?
Why not just dig out the old tube of silicone and make your own?
Smear it all over. As long as no holes are covered, no sweat.
Why even a gasket on the pump, or pan?
Just like Brylcream. A little dab'll do ya.