The real question is basically - is full autonomy both technically possible and culturally/politically acceptable within 5, 10, or 20 years? Because full autonomy isn't really ready now (or else we wouldn't need hundreds to thousands of drone operators in the Ukraine war). And at least the USAF doesn't think remote control will let them do what they need (which is to fly from Japan to Korea or Taiwan, or Philippines to Taiwan, and contest/control the skies in the face of a basically peer adversary).

Because no one knows that answer, everyone (governments, militaries, manufacturers) is hedging, and CCA is part of that hedge.