The bowling and batting average of 40 was in reference to Matthews, who you mentioned.
The

thing was about SOD. My apologies for allowing the confusion.
Exactly, and especially at a young age. If your going to be playing a senior grade of cricket, you need to make sure that at least one of the aspects of your game is at a good enough level to get you a promotion to a higher side, therefore you often concentrate on that aspect.
In addition, if your a promising young batsman, and your a pretty good bowler for your own age level, but not very good at senior level, then chances are that the bowling side of your game will be neglected, even in the nets at training, and you don't get a chance to hone it. Then when your side is crying out for an all-rounder, you think "Well, I could have been one if you let me

".
I've seen it happen (I wish it was to me though, lol, it'd give me an excuse for my mediocrity

)