It seems that not so many use that station.
Common sense would suggest that disabled parking be provided such that there is sufficient space almost all the time, that the disabled bays fill after the rest of the car park is full. And that the ratio between reserved bays and others will not be the same for a commuter oriented railway station as for a supermarket, or a cinema, or a zoo, or a town centre or a hospital. And none of those ratios will be the same as that in the general population between blue-badge holders and others.
But carry on making your own reality.