This is the same BS I keep hearing, I would like to see the reasoning behind this with actual evidence to back up this claim.
As for defensemen, Bure played in what is considered largely as the Golden Age of Elite defensemen. You had Bourque, Leetch, Chelios, Pronger, Coffey, Stevens, Niedermayer, Blake, Zubov, MacInnis and Lidstrom all playing and all were relatively in their primes when Bure was in his prime. All those defensemen were not just great offensively (in most cases) but also very mobile and were amazing defensively.
If anything, the defense (elite status speaking) is rather weak in today's NHL.
As for goalies being weak, Hasek, Brodeur, Roy, Cujo, Vanbiesbrouck, Dafoe, Kolzig, Belfour all say hello.
These claims are utter nonsense. There is absolutely no evidence to suggest that goalies, defenses and defensive strategies are better in today's NHL. Also goalies played 70 + games regularly and still put up those great numbers they did.
All goalies do now is go down and take up the entire bottom half of the net, and since players like Ovechkin and Stamkos exploit this now, if Jagr, Bure, Selanne, Karyia, Lindros, Sakic, Lemieux (all amazing shooters) were playing in their prime in today's NHL, they would exploit these weaknesses to no end.
Until someone can actually explain to me why a very old, very slow and heavy Jagr is still a very good 2nd or 1st line player in the NHL today (with this so called harder NHL today) then all these claims will be just nonsense.