It was a different league back then. Back when Babe Ruth was playing he was playing against watered down opponents. Mike Trout would hit 90 hrs if he only went against people of his own race.
Very overstated & shortsighted observation:
Mike Trout is the best player in baseball today hands down but he never, not even once, lead his league in HR's let alone the entire major leagues.
After full integration only Killibrew, Arod & Schmidt have lead their league in HR's 5 times, picking one of them would have been more sensible.
And what's is this nonsense about facing pitchers of his own race? Since full integration The hall of Fame has inducted 32 pitchers 27 were
ofthe same race Ruth & later Foxx faced, seems to me that's evidence that general speaking the best pitchers he is facing are of his own race now.
In 'Green cathedrals" the outfield fences of 80 years ago DiMaggio, Gehrig, Foxx & Greenberg were firing away at CF & power alley fences
that were 17% further away than those of current ballparks! In the 1920's before bleachers & grandstands were constructed the outfield fences
were even more distant.
Trout who is just as superb on defense as he is on offense has robbed many a player of HR's leaping over a 400ft centerfield wall
in every modern stadium he's played in while in the 1950's in the Polo Grounds Willie Mays would have stepped in a few feet to make
one of his famous 'basket catches' of a ball of the same distance.
There is website you might be interested in which give the fan a idea of the dimensions of all ML stadiums past & present & the adjustments
made through the years, very thorough:
Clem's Baseball ~ Stadium lists
score at 14-6; with Monday off, both teams have 6 more games on the road before the ASB, now a pretty big stretch for the Red Sox. 
