I live (Google maps) 1.5 miles by road or 1.3 miles on foot from Marple station, I wouldn't dream of parking down there when I can walk it in under half an hour.
There must be a lot of people with less mobility, don't want the exercise, or who live further away eg Turf Lea, Windlehurst, Far end of Mellor, Chisworth, etc. People living on Strines new estate where trains stop less frequent. Jobs in Marple bridge; shops, cafe's & pubs could be people from outside the area. Teachers & workers at Ludworth school may come in from outside, very little parking at the school. Contractors working on homes & business's need to park locally.
If local people unnecessarily take up the spaces, where will all these people park? We have to be more considerate to people who have little or no alternative. Or provide a lot more parking.
It might help if children walked to school like most of us oldies would have done. Keep childhood obesity down.