Don’t need to explain it to you. You answered your own questions just by asking. The answers are yes and yes.
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The hitters are much bigger, stronger.......... and the balls are juiced. And, most all of them are swinging for the fences.
That's about it.
However, I think if you look it up the runs scored are not tooo much higher than twenty to thirty years ago.
Be well...........
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PS .... have a little fun.
* Bob Gibson is the luckiest pitcher I ever saw. He always pitches when the other team doesn't score any runs. Tim McCarver
* Trying to sneak a pitch past Hank Aaron is like trying to sneak the sunrise past a rooster. Joe Adcock I never took the game home with me. I always left it in some bar. Bob Lemon
* Well, it took me 17 years to get 3,000 hits in baseball, and I did it in one afternoon on the golf course. Hank Aaron
* "You don't realize how easy this game is until you get up in that broadcasting booth." Mickey Mantle