Couple of things bro,
Yoel Romero did not use any trick. Romero got tested out of competition, they found a banned substance, he gave the supplements he was using to USADA who then tested samples off the shelf at stores in the area and CONFIRMED it was a tainted batch. So unless you want to pretend USADA made it all up and just let Romero off the hook to juice - then you are just wrong, factually wrong. Yoel has never tested positive once in his life - under all the UFC testing and the Olympic testing - not even historical batches of samples which were tested - so if you want to keep arguing that, i'd rather beat a baby seal as its a superior challenge.
Letrozole does not crush estrogen levels, it CANNOT remove estrogen in the body but block production - so im not sure where you are getting 'crushed' from - certainly it could be used to MASK usage however it is more likely the amount found in the 'dick' pills which USADA confirmed did exist was the culprit. Also, it proves absolutely nothing. Clomid is also an EXTREMELY common ingredient in sexual enhancement pills. Again its far more likely that Jon, the party animal needed some help to get his dick hard to fuck the mountain of whores he encounters in the various bars and crack dens he frequents.