Ford perfected the reliable transmission, the C4 and C6 (and later, the 4R70W). Like most manufacturers, they are interested in the profitable transmission. If it's extremely reliable, that's a bonus. However, if JATCO can make one as reliable as they do (and profitable), Ford, GM, Chrysler should also be able to do the same.
I understand profit, from a business' view. I hope the car manufacturers understand that, thinking along those same lines, that some of us will only purchase what we consider a reliable and 'cost effective' product.