The closure of Headcorn would be a great loss, not just to private aviation generally, but to the leisure industry as a whole, also to the local community - as has been pointed out, the owners allow all sorts of facilities there to be used by local community groups. It is part of the machine that keeps aviation in the country supplied with pilots.
Out that side of London there's not a lot of licensed airfields still open and usable. Manston, Lydd, Rochester. Where are people supposed to go?
So flying is a minority pursuit. So what? Is that an argument for its removal? It's only a minority of the total population who play golf, or tennis. If we are only going to cater for the majority, life in this country will be very boring indeed.
Even before I flew I used to enjoy watching the aircraft buzzing overhead on a Sunday afternoon (I was brought up close to Booker). The noise is not intrusive. Headcorn is not a busy airfield.
But you will always get NIMBYs who think that what they want is what everyone should want, and if they don't like something it has to be closed down.
Likewise, you will always get the fools who move to the vicinity of an airfield and then complain about the noise.