The fact that aerospace is an exceedingly difficult and specialist field to get involved with? Military aerospace with products like modern fighter aircraft are another entire world away from the civilian aerospace industry, there is a reason why so few nations are able to even assemble somebody elses aircraft, let alone built their own indigenous aircraft. Factories aren't just boxes that materials go into and products come out of, automotive workforce/facilities/equipment have little, if anything to do with modern military fighter aircraft production or assembly.