Sub-continental frailty?

Charlie Austin on Atapattu:

His greatest weaknesses as a batsman were his nerves at the start of an innings,
his often appalling running between the wickets, and the traditional
subcontinental frailty outside the off stump, especially on bouncy pitches.

What the hell is this “subcontinental frailty outside the off stump, especially on bouncy pitches”.

Off-hand I can recollect Allan Border being ridiculed (sledging?) by the WI slip cordon for the same frailty.

Subcontinental frailty,indeed!