These kids are taught much earlier so guys make it who didnt in the past. The league has a dozen guys who are capable of winning a ring if in the right situation. The subpar play comes from the bad coaching that I see league wide.
Lets jump back to the early 80s. Noll with 4, Gibbs 3, Flores 2, Landry 2, Shula 2, Parcells 2, and Walsh 3 SB wins. That is 7 coaches with multiple championships coaching at the same time. Dont forget Reeves, Leavy, Grant, Phillips, and Coriel who were also very good but didnt get over that hill. Notice I didnt even give Ditka a mention.
Now look at 2023. Reid, and Bellichick are the only multiple time winning coaches in the league. There are so many 1 time winners The coaching pool in this league is crap.