Problem is there are so many issues at play. When I was much younger/a little kid - 1970s - we never even had car seats. Just got plopped onto the back seat. No seatbelt, nothing, just rolling around like a billiard ball! The spaces were OK sized, the cars were generally small. (Looked normal at the time, but look tiny looking back.) Always easy to get in and out.
Then my brother came along a decade later, (in the 1980s,) and he had a very basic child's car seat. Again, small-ish car, no issues getting in and out. Stopped using a car seat at around 4. Then used seatbelts. (Law from 1987.)
There were no child and parent spaces. (Not that I recall.)
My DC came along mid-late 1990s, and still the car wasn't massive (we always had a car around 10 years old, so would have had a 1980s car.) We used child zones - they were quite new-ish then, and some places were only just starting to have them. We got in and out OK in child zones, AND normal ones (as I said, small-ish car.) We stopped using baby seats when they were about 5 or 6. I am pretty sure there was not a law that said older children (7-8+) had to be in car seats then.
Fast forward 22-23-ish years, and the cars are now MASSIVE. Every other woman and her dog has a giant ass 4WD, she can barely see over the steering wheel, I see many women struggling to manoeuvre in these cars (and park!) and she has limited view behind her (can't see things low down.)
I don't mean to just pick on women sorry, but I see way more women driving these big ass 4WD than men, and some of them do seem to struggle a bit.
I remember an experiment on the TV some 5 years ago, where 24 three to four year olds stood directly behind a large 4WD car, (in 3 rows of 8,) and the driver could only see EIGHT of them; the back row. So the vision out of them is limited too.
So yeah, they are so clucking big that they can't use normal parking spaces now because they can't get the door open properly, let alone get kids out! Even many 'normal' cars now are bulky, because this is the way they are made.
I think so many people have the big 4WD spacious beasts, because they are peddled to families, as amazing 'family cars' where you can pack up half your house to go away for the day/weekend/week etc.
Oh, and the child seats that they have to sit in now til they're TWELVE (and often taller than the fecking mother,) are so big, that a normal/small sized car is a struggle too.
We have been sold this shit, big bulky daft-sized cars, and huge fecking car seats, but still have the stupid wanky tiny car spaces. (And also new build homes still seem to have a garage that would only fit a smart car, or a fiat 500 in!) So these cars have been peddled to people, but the garages and car sparking spaces don't suit!
So yeah, people do need these child and baby spaces unfortunately, as the normal ones are laughably tiny, and many peoples cars (especially those with babies/young children) are HUGE. Heck I occasionally struggle to get out of the car (when there are cars parked either side,) in a normal space with no babies, and my car is a small-ish saloon!
There does not need to be a limit of 5 to the child in the zones though @seize as children have to be in a car seat now til they are 12!. Although a 12 y.o. does not need to be in a child's car seat when they are over 4 ft 5. My 2 DC were as tall as me at 12. (I am 5 ft 3.) I think they were 4 ft 5 at about 8 or 9! I reckon most children of 12 would be over 4 ft 5.
When your child hits 4 ft 5, no matter what their age, they can sit like an adult ... (In the seat with a seatbelt on.) Unless the child has SN of course.
The parents using child zones are not 'lazy fuckers' even if the child is 10 or 11, they are quite entitled to use them. (I mean if the 10-11 y.o. is 6 foot -well maybe not then!) 😁
Child Car Seat Laws In The UK - Which?