From the beginning of time a cricket ball which is polished on one side and roughed up on the other will swing more than one which has a similar surface on either side.
To polish up one side cricketers have always polished the ball on their trousers. Totally accepted. Done in full view. Absolutely AOK.
At the same time cricketers have, for donkeys’ years, put a bit of grit in their pockets to rough up the other side. Not done quite so obviously as polishing the ball on your crotch, but generally accepted as common practice.
If the desired effect is to make the ball swing more, is it morally worse to polish one side than it is to rough up the other?
Clearly, to the man on the top of the Clapham Omnibus, the reasonable, logical answer is that there is moral equivalency between polishing and roughing up.
The fact that good men can be reduced to tears by the suggestion that the practice is deeply disgraceful is a shocking example of how public opinion can be so easily swayed by spurious sanctimonious moralising.