And in the 1990s, the way to play pro basketball was to beat the other guys up until they succumbed, and to slow the game down until 90 points was a winning score. People hated watching it. So the NBA changed the rules.
Baseball has this hallowed spot in our sepia-toned memories, so nothing can change about the game ever. Even the stuff that's patently obvious -- like the Astros and lots of other pitchers doctoring the ball -- they won't do anything about it. But unlike in the past, skills and (especially) strength have developed and will continue to develop far beyond the point where the game balances out.