If you want Europe to handle more of its own defense, this is part of the deal. Of course, they will have to work with each other, which may prove even more difficult than ITAR and the Trump administration. Only time will tell.
You would know better than I, but to me, it seems like the administration part isn't that big of a road block because at the end of the day, if Grum-Mart wants to make money, Trump is inclined (and probably motivated) to help them.
I can completely understand your argument otherwise.