I don't know why, but I don't particularly care either.
It makes sense, particularly because applicants aren't very bright. They think think they have no chance getting into so-and-so with 22, because their mate Hugo and their Asst Head Mr Toddle said that so-and-so would never in a million years consider 22! And so-and-so actually takes in 22 all the time, meaning Mr Toddle, Mr Hugo and Mr Applicant are morons who would make a catastrophic mistake by not applying to so-and-so.
But I don't particularly care either.