As other commenters have stated, this export ban seems both very narrow and an extremely good idea.
My interpretation of the meaning & intent of the ban is that it is banning GUI-based tools for training CNN's to automatically identify specific types of objects in aerial imagery (e.g. distinguishing a limousine from a different type of car). These CNN's being trained are almost certainly intended for use in autonomous targeting of airstrikes by fully-autonomous weaponized UAV's.
Here is the text of the specific ban:
https://s3.amazonaws.com/public-inspection.federalregister.g...
Here is a really good book for background on this topic:
https://www.amazon.com/Army-None-Autonomous-Weapons-Future-e...