Moly, that rule has been in existence for years. No great comfort there I'm afraid.
To the left handers, offies like Swann aimply pitch the ball on or about the line of the stumps and impart varying amounts of spin on to the ball. If they pitch it on the stumps and it's a top spinner, they have a chance of LBW or bowling the batsmen. If the batsman plays for a toppie, and it's a genuine off spinner, the batsmen is a big chance of edging + several other situations. Not to mention the fact that they'll be around the bat all day for bat/pads etc.
Besides, the batsman doesn't have much time to decide if it's a borderline case of where the ball is going to, or has, pitched.
Hope you find some comfort in your theory, because I don't think the batsmen will.
As we all know, cricket can produce some amazing occurences at times, so we're a chance of saving the test, albeit a very very minute chance.
