You're being a bit hyperbolic again, and seem to be equating advancements in human athletic ability (enhanced through training, sports medicine, etc) to the advancements in other technologies (computing, communications, etc), where they advance exponentially.
In reality, human athletic ability has advanced very, very slowly.
For example, the 100m World Record in 1911 was 10.5 seconds. Today, it's 9.58 seconds. All the sports medicine, technology, in depth analysis of strategy, equipment, and nutrition advancements over the past 103 years have only contributed to a 10% increase in human speed. And as I said, other world records like the high jump and long jump have stagnated. , no long jumper in the 2012 Olympics could even come close to the mark set in 1968.
The reason basketball looks so much more "athletic" today is because of specific rule changes that have been implemented to speed the game up and open up offense, better cameras that broadcast at smoother frame rates, and the advancements in strategy and fundamentals you've mentioned.
Athletically, players today aren't much more athletic than players of the 70s. Are they more athletic? Sure. But only marginally so.