Ha ha! Just shows how much I care about cricket! For me, a batting average is between 0 and 100% (or [0 1], as in baseball).
Anyways, my point still stands. Being dominant is being able to be consistently above the average. And this is measured by analyzing the distribution. And in that context, Bradman is just off the charts.
Just for fun, you can enter career PPGs, career batting averages, career homeruns etc. in a spreadsheet a do a bar graph of the top 100 players for each sport. Bradman will be so off that it will instantly become clear who's more dominant.