"What if only a few percent understood the proof, but managed to "prove" to others that they understood it by using this knowledge to unlock other difficult pro

"What if only a few percent understood the proof, but managed to "prove" to others that they understood it by using this knowledge to unlock other difficult problems?" Check the Terrence Tao comment below the post (also posted by someone else in here). I think if those who claim to understand the proof could use the techniques to proof other things, or even to provide new proofs of known results, the level of trust would immediately go up dramatically.