I said I won't argue points in this thread but I will address this point because it looks logical prima facie, but is clutching at straws once you delve further.
The standard of cricket from Bradman's time till now is very similar. Not only have averages remained pretty consistent through the eras of bowlers, but the same of batsmen. The best players always seem to average a certain average. More importantly, eras are not separate blocks of time. The eras of Bradman, Hammond, Miller, Hutton, Sobers, Gavaskar, Richards, Border, Tendulkar all overlap from one guy to the other. And yet the best batsmen never, ever, got a career average higher than 60, let alone close to 100.
For the standards to have shifted since Bradman's time to what it exists in what you may call "modern" times (like now), the sport would have to be unrecognisable to explain his 100 average. The difference between the 90s and the 00s between batting averages is about 3 points on average and yet we can vividly see the great difference between batsmen. Yet you would like us to believe that cricket has changed so much in this time and that it happened in such a fashion that we wouldn't notice it...yet it could account for a 40 point difference in averages between batsmen?
And that's the last point I will discuss on here because, it wasn't my intention to discuss points here and I do not want it to go down that road.