In JSON "object property" is not synonymous to "dict", dict is just one of many ways to express object properties. JSON can contain a mix of differently typed

In JSON "object property" is not synonymous to "dict", dict is just one of many ways to express object properties. JSON can contain a mix of differently typed objects too, which is similarly meaningless for serialization. And serialization is not the only usage of json. JSON has a concept of list, but lists can be defined in many ways. And list is not the only collection type one might want to express in json. For example, is package dependency list a list or a dict?