Earlier quoted context omitted.
I think Rapid Dragon, plus recent talk of using the B21 for air combat/to replace NGAD are pointing in this direction: use large, numerous, and cavernous planes for Pacific firepower.
Rapid Dragon cannibalizes our existing military transport capacity and can't achieve the same kind of economies of scale and high operational tempo that would be possible with a commercial airliner platform. Commercial airliners are designed to land, swap passengers, refuel, and take off with very little down time. Meanwhile, military aircraft are notoriously high maintenance.
Do you mean rapid dragon should have been developed to work with our commercial airliner fleet rather than our military transport aircraft?
How would that work? I don't see rear cargo ramps on commercial aircraft (there may be some, but I don't know of them).