Maybe if tke mxers got free, custom built areas to play at it would be less of a problem.
Firstly , your spelling is worse than mine, congratulations.
Secondly, when was the last time you saw a cyclist on an MX track?
By default MX is the more expensive hobby, pistons and rings last about as long a superstar bottom bracket. They do hundreds of times more erosion (erosion is proportional to power * weight), ergo their facilities are either built to withstand erosion (supermotard racing), or more commonly use it as a feature (motocross/supercross).
So no MX'ers don't have the free facilities MTBers do (arguably Swinley isn't free, and others charge for parking) but equally, mountain biking costs peanuts in comparison bot to get involved in and to build and run facilities. Thus attracts a different market. Can you imagine as many families getting into mountain biking if they had to shell out what they would for MX?