How many people feel that they are therefore above criticism?
Judging by Gavin Strachan's blog on the BBC website, this attitude is quite common in football now, even at the lower levels. It can also be seen in business and, especially, politics.
How many potential authors refuse to listen to suggested changes, or comply with submission guidelines?
To be fair, some criticism aimed at people is wholly unfair and has more to do with the bad attitude of the giver. But too many see criticism as unwarranted at any level. There lies part of the problem.
Another part of the problem is that in the past, and the present, too many people have used criticism as a bullying tactic, or a method of control. Critics of literature, theatre, films and music, among others, use criticism to get themselves noticed (and bigger pay packets), rather than as a genuine method of helping someone improve.
The reply from the critiqued has become equally fierce.
At the moment only the extremes of each side get heard. Genuine criticism has been lost in the noise and people fear giving or receiving it.