Shed
Your obsession with MAN's diversion policy is verging on the psychotic.
You cite 'safety' as the root of your concerns. Can you provide one, just one, example of an aircraft's safety being compromised by the diversion policy of Manchester Airport? No? Didn't think so.
Your scenario of planes falling out of the sky because they have run out of fuel whilst begging Manchester Airport to let them land is delusional and scare-mongering at its worst.
Instead I suspect you hanker for the days of yore when lots of rare planes would descend from the mists to brighten up your school days.
Planes having to divert from their intended destination is a nightmare to all concerned. Stranded passengers are much more likely to be cursing rather than blessing the name of Manchester if they inadvertently end up there.
When steps don't show immediately, when they aren't allowed to disembark, when they get forced to stay on-board for hours, the passengers will lay the blame at the door of the Airport whether it is their fault or not - a situation the airlines are happy to let evolve in order to deflect any blame from their own inadequacies.
It is the worst possible kind of publicity for the airport and the city. That's the reality.