I have appreciated P&C spaces whenever I have had my GC in the car and would not see them abolished, but Blue Badge spaces are a necessity for many and should always take precedence. Mind you, with so many 4x4 type cars , the extra width is fast becoming necessary.
When my children were small I used to shop at the Arndale Centre in Wandsworth (long gone I believe) . Sainsbury’s was on the ground floor with a multi-storey car park above. Trolleys had to be returned to the store so once you had paid for your shopping (and packed it into bags) you wheeled your trolley containing toddler and shopping to the lifts, went up to whichever floor, decanted shopping into boot, wheeled trolley plus toddler (in the baby seat) back down to the shop, got your 10p back and then trailed back up to the car , carrying toddler who was bored, hungry and stroppy by then, to the car, hoping you had not overstayed your 2 hour parking limit!
If only somebody had invented P&C spaces especially on the ground floor or even outside the shop!