Has it not ever been thus? With both bat and ball?

OK, Lindwall gets mentioned as an all-time great master of swing (with tales of an ability to get the ball to move 12" either way from a near identical action). Lillee was perhaps more characteristic of the best of Aussie bowling though: he did eventually mature as a genuine swing bowler... but he was no Botham - he didn't, as a young man, have the mastery of swing that made the young Botham so devastating.

Batting-wise... Australia has long been the home of high backlifts, high hands, getting onto the front foot, taking the ball early and swinging through the line. I'm sure exceptions could be found but Aussies have not, as a rule, grown up having to linger on the back foot and play late with soft (low) hands to counter movement - and that has to have had an impact for more than just the current generation.

The swing issue is an issue with the 'keepers as well: the English tradition involves taking the ball with the hands up and infront of the face to maximise the chances of coping with late swing (after the ball has passed the bat)... whilst the Aussie backstops have (at least in more recent years) preferred a hands-down and take to the side of the body approach.