Boyd and Pierre Sprey are hacks part of the luddite fighter mafia. If it was up to them the most successful fighter plane of all time (F-15) would have been replaced with cheap f-5 clones without BVR or RADAR capabilities.
I guess it's fortunate that technology continued to advance to the point where the F-16 finally does have improved RADAR and BVR (Block 20 and onward).
But, yeah, they had tunnel vision about the mission.