In reply to:
https://devrant.com/rants/3957914/...

Okay, we must first establish common ground here. What do we understand about "showing"? I understand you probably mean displaying/rendering, more abstractly: "obtaining". Good, now we move on.

What's the point of a front-end? Well, in the 90's that used to be an easy answer: to share information (not even in a user-friendly way, per se). Web 2.0 comes, interaction with the website. Uh-oh, suddenly we have to start minding the user. Web 3.0 comes, ouch, now the front-end is a mini-backend. Even tougher, more leaks etc. The ARPAnet was a solution, a front-end that they had built in order to facilitate research document-sharing between universities. Later, it became the inter(national) net(work).
First there was SGML to structure the data (it's a way of making it 'pretty' in a lexicographical way) and turn it into information (which is what information is: data with added semantics) and later there was HTML to structure it even further, yet we all know that its function was not prettification, but rather structure. Later came CSS, to make it pretty. With its growing popularity, the web started to be used as a publishing device.
source:
https://w3.org/Style/CSS20/...

If we are to solely display JSON data in a pretty way, we may be limiting ourselves to the scenario of rendering pretty web pages using aesthetic languages such as CSS. We must also understand that if we are only focusing on making a website pretty with little to moderate functionality, we aren't really winning. A good website has to be a winner in all aspects, which is why frameworks came into existence, but.. lmao, let's leave that to another discussion.

Now let me recall back my college days.. front-end.. front-end.. heck, even a headset can be a front-end to a pick-order backend. We must think back to the essence, to the abstract. All other things are just implementations of it (yes, the horrendous thousands of Javascript libraries, lol).

So, my college notes say:
"Presentation layer: this is the UI.

In this layer you ask the middle tier for information, which gets that information from a database, which then goes back to middle tier, back to presentation. In the case of the headset, the operators can confirm an order is ready. This is essentially the presentation tier again: you're getting information from the middle tier and 'presenting it' as it were.
The presentation layer is in essence the question: how do I bring my application data to my end users in a platform-and solution-independent way?"

What's JSON? A way to transport data between the middle tier and the presentation tier. Is that what frontend development is? Displaying it in a pretty way? I don't think it is, because 'pretty' is an extra feature of obtaining and displaying data. Do we always have to display data in a pretty way? Not necessarily. We could write a front-end script (in NodeJS perhaps) that periodically fetches certain information from a middle-tier is serves a more functional role rather than a rendering one.

The prettification of data was a historical consequence of the popularity of the web (which is a front-end) (see second paragraph with link). Since the essence of a front-end is to obtain information from the back-end (with stress on obtaining), its presentation is not necessarily a defining characteristic of it, but rather an optional and solution-dependent aspect, a facet.