There's huge parity, big money with the game enticed better scouting and such. League rule changes no longer allow one team to have 8 HoFers, and the talent is much well distributed over the entire league.
Kobe scored 81, Robinson scored 71, Rodman had a string of 30+ rebound games, but they aren't 3 feet taller than anybody else. Wilt fought it out with other guys who weren't 7' tall, but they were a good 6'10, 6'11. Ben Wallace is 6'10", but he was one of the best defensive big man in the league for a long time, Duncan's 6'11". Will Wilt score 100 points or grab 55 rebounds in today's game? I doubt it, but he would be able to put up great stats because of his athleticism and general knowledge of the game.