... they should suggest to the Govt to make non road/streets optional, so that park dawdling is more enjoyable. That's sensible.
Ummm... isn't it illegal to ride a bicycle on a footpath? Yes So park-dawdling par bicyclette is not allowed, so it makes no sense to legalise helmet-free whilst riding in the park. A park isn't a footpath, unless they signpost No Cycles which I think is rare
Personally, I think it's better for children to cycle on footpaths rather than roads (with or without helmets). I agree
And the real answer to cycle safety is cycle lanes separate from motorised traffic, not largely-ineffectual helmets. (Incidentally, years ago when I lived there, in Switzerland mopeds were allowed to use cycle lanes. I think that on balance this is a good idea, but perhaps superceded by e-bikes?)
I also agree re cycleways are a great idea, for many reasons, and also for eBikes or mopeds