Jerry didn't build those teams though. The fact he has not replicated anything close to that success since then says it all.
Which is kind of the same argument you can make for Elway with Manning. He's had zero success without Manning playing. He has drafted poorly every year since he joined the franchise and he's had some high picks. He's done ok with other people's draft picks but without a top flight HOF QB, he's been terrible. I give him credit for convincing Manning to help craft 4 of the best years of Denver football ever...but I also give him credit for being terrible at building the team through the draft.