Right back at you.
The reasons not to relaunch the T-38 are that it's a 60 year old design for a 60 year old training concept. There have been a couple of revolutions in training philosophy since the T-37/T-38 basic/advanced idea of the 50s
The last supersonic trainer to enter service was the Mitsubishi T-2 at the end of the 60s. The handful of supersonic hours didn't justify the added cost for what could be equally done on an intermediate trainer such as the Hawk/Alpha Jet.
Once high performace turboprops could simulate jet throttle performance the operating costs of a T-37 type basic trainer again became unjustifiable.
Even today the only reason to go supersonic is if you also want a common design with a 70% scale F-16 for your combat squadrons. (ie the KAI T-50/TA-50/FA-50)
Your expertise is based on what?