Yes, as a group today's hitters are way better physically; plus there is way more information about what makes a hitter good. Slow motion alone has removed a lot of bad ideas about hitting and how hitting REALLY works. And so on.
Pitchers as a group are better as well. Same thing.
Also, players are adapted and trained to how the game is played today; HR/lifted balls prioritized; pitching specialization prioritized; etc, etc.