Anyone who thinks Sprey's research into the LWF program was somehow ill informed has likely missed the point. It was about finding out what worked. America didn't have the Me-262. Instead, America won the daylight air war over Germany with more prosaic equipment. That all changed for the jet age. Sprey was only asking whether it had changed for the better.
It was ill-informed though.
The Lightweight Fighter as envisioned by Boyd was purely a vessel to attempt to prove the efficacy of Energy Maneuverability Theory. The whole reason that they lobbied for it was because Boyd's input on the F-15 beyond a certain point became increasingly marginalized and because the USAF did not design the F-15 to be the pure dogfighter that Boyd wanted it to be. The YF-16 and YF-17 as envisioned without the ability to fire air to air radar missiles, without a meaningful radar, and without any ability to conduct air to ground operations was a completely stillborn concept.
There is not really a single time post-1970 that Sprey or Boyd were not looking completely backwards. Even when the USAF adopted the F-16, Boyd said that they ruined it by loading it up with air to ground junk, and basically insinuated that he should have purposely designed it with even less fuel then it already had.
What they essentially envisioned was a fantasy world where missiles did not exist and would not improve, and that winners and losers would be determined by who had the most of the best turning airplanes with the best kind of machine guns.
Sending Aim-9J equipped F-16As against R-24R and R-27R equipped MiG-23s and MiG-29s circa 1985 would have been a suicide mission. Even by the time of its adoption the F-16 was also too much airplane for USAF pilots in the Fighter Mafias eyes which is why they wasted a lot of time lobbying to replace F-15s with hordes of F-5s!
If the Fighter Plane Mafia had been around for World War II they would have designed an American Oscar or an American Spitfire. The P-38 would not have ever been adopted because it was too complicated, too expensive, and didn't turn well enough.