In fact, it's not just their own camouflage pattern, the ABU actually had a distinctive blouse and pants that are different from the BDU that came before, or the ACU that the Army had adopted. Then they took the sage-green fleece from ECWCS Gen III (what the Army was wearing), and added the APECS Goretex parka that the Marine Corps was wearing, only in the ABU tiger-stripe rather than MARPAT.
Most of the actual battlefield airmen (i.e. the people who might reasonably expect to find themselves in combat conditions where camouflage could help like combat controller, TACP, PJ) didn't wear it anyway.
As pointed out elsewhere, this is very largely about esprit-de-corps in the context of a military organization, even if your job is actually avionics maintenance or personnel.
It does seem like a huge waste for all the services to have their own completely distinctive utility uniforms though - the pendulum is swinging back the other way now with the Army, Air Force and Space Force all back in the redesigned ACU/OCP with stitching color (black/spice-brown/blue) as the service-distinctive element.