Why combat aircraft require a support system, not just delivery

Could Northrop T-38 Talons serve as a less capable substitute if F-16s were not sent to Ukraine?

Changing aircraft does not remove the central support problem: Ukraine would still need trained maintainers, compatible weapons, calibration equipment, and secure operating bases.

The answer shifts from the airframe alone to the infrastructure that makes an air force usable. Pilots and fitters must be trained, but bases also need tools and facilities to inspect engines, calibrate radar and sensors, and load weapons that communicate correctly with the aircraft. Operating from a NATO base would create a separate escalation problem by making that base part of the combat system. Second World War heavy-bomber squadrons offer a comparison because their range did not make their ground organization portable. Delivering a platform is only one part of fielding a sustainable military capability.