I agree that a car was very useful in going around the bases and scoring runs (probably never would have even got onto the field without one), but motorkhanas, hill climbs, etc are more like the pub/night club, etc where you are trying to pick up than a true track day, where it is more like a rainy Sunday when you first move in with your girlfriend, where you spend more time actually having a go, than simply waiting in the stands, barely get warmed up and then it is back to the stands again.
Motorkhanas are like trying to do skiing at a resort without a lift ticket. Lots of effort for a very short quick result. A true track day is more like riding the ski lift, lots more productive time (even with the waiting in the lift queue to get onto the piste) and somehow seems like a much better use of time (when taking self indulgent time out from the family).
Another example would be to play four holes of putt putt golf in four hours, whilst watching 30 other people play the same hole as you before you get a go. Hardly a great utilisation of our scarcest resource - time.
(I thought I should try to get away from the sexual innuendo for our female members, or to be politically correct, should that be female forum participants, wait forum is used in a magazine. For another topic - oh, I give up, there is innuendo in everything, brig politically correct is just too difficult)!