There are a lot of people who store JSON in NoSQL databases. After fetching a JSON records you generally view the JSON or you do as a developer. That is where the tool is handy as you get get something like a FHIR record on a single page instead of crunched into a single line to expanded over multiple pages.
True, and this is a nice tool to do so.
JSON is mostly for people and not machines in that it is meant to be easily readable and editable by humans. If you wanted a something for machines you would store your data in a compressed/binary format.
Which demonstrates that JSON is pointless.
It's too ugly for humans (too many quotes, too many escape characters, and no comments) and too texty for machines.