That's the easiest question of all, but before I get there. I'm sure
@peterhrt demonstrated not only how flat those pitches were, but how there was a converted effort after he retired to lively up the pitches, which was more or less accomplished everywhere outside of the Caribbean.
Persons always reference Bradman as a statistical outlier, but Wilt had some crazy seasons as well, a 50 point, 25 rebound effort that may never be matched, the reason it's not celebrated as much today is the same reason why the Celtics championships aren't. Too few teams, two rounds of the playoffs and one team had most of the good players. It doesn't mean the same.
In that time there were two certifiable ATG bowlers, Grimmett and O'Reilly. It's not fair to say Bradman was even twice as good as Hammond because with each other being the only other competitive team it totally changes the equation.
SA, Ind, W. I and each other. SA, India and WI are minnows, outside of Bodyline England was not a force. So if each team faced 2 minnows, a feisty WI bowling attack (though minnow team over all) and each other as primary opposition, and one team was average to poor and the other had unquestionably the best two bowlers in the world, how is that an even playing field.
It's not like Viv, he didn't have to face his own bowlers but he had Imran, Wasim, Hadlee, Chandra, Lillee, Thompson. Bradman didn't have to face his guys but he had to face .... mainly medium pacers on flat decks.
I probably haven't articulated this as well as I wanted to, but basically with such a small amount of quality opponents, namely 1, and you have by far the best attack in the world, played in 3 countries and super favorable conditions, he had the perfect storm. And yes he capitalized better than anyone else, but does anyone where believe he would have done this in the '80's or 90's? Great batsmen are impacted more by good bowling way more than the other way round, that's proven in the game. Tendulkar and Lara struggled vs Donald, Wasim, McGrath, their numbers took a hit, that's what happens when you face the great ones in the slightest of favorable conditions.
Bradman was the greatest batsman ever, he was better than Hammond, better than Tendulkar, better than Richards, Sobers, Hobbs, all of them. But the only batsmen he was twice as good as we're the ones on his own team who faced similar circumstances, especially in the time of only two good teams.
I don't expect anyone would agree with me, and that's not my objective. I'm just explaining my perspective.