Isn't it the other way around - people, especially when young, like to imagine themselves as someone special, so the media give them the perspective of the most special individuals they can find? Being a king, on its own, may not qualify - but the popular shows are rarely about "just" kings, it's mostly about ones who did something impressive (if evil; though I agree that last part tends to be edited out).
In fantasy literature, a hero is almost certainly either a prince or at least of royal blood; in sci-fi, he's at least a progeny of a war hero or great inventor. Even in romance slice-of-life, you'll get mysterious amnesiacs, rich CEOs children, shrewd nerds with underworld connections, etc. much more often than statistically possible - nobody wants to read about "normal people", not really (when we think we do, it's just the author writing so well that he convinced us his "normal people" are different!)
I can't rule out the possibility that this natural tendency is being exploited and manipulated in some cases, but the stories have always been about heroes, long before anyone thought of erasing anyone else's class consciousness.
I mean, It's the same as consciousness of ourselves in the present.
There are pieces of media that present the real struggles of the average worker. But not that many. Many films are instead invested in the ephemeral (and ever lasting) questions of reality, fiction(fantasy/action/drama), or inane or politically convenient biopics (if not totally altered).
You will occasionally see a nod to "struggling to pay bills" or some mundane romanticized struggle, stuff like that, but almost never a picture of what its actually like.
For the few popular films that do show it, and this is my critique of most media, they never compel the viewer to ANSWER the question of why this happens. This is because to present the real working class life is also to critique it and the conditions that create it.
The working class life reveals it's own critique. And that critique is not something that media owners like because it puts into question the whole status quo. It is INHERENTLY politically charged content.
So they avoid painting a real picture of average people. This lack of real exposure is a heavy influence on our ideas of reality. And essentially the viewers take this image and runs with it. The viewers ends up not learning HOW the world works, they start to see themselves as "temporarily embarrassed millionaires", and end up seeing society as a pool of ever-permanent social mobility, its just not their turn yet.
This is, essentially, the same thing they do with the past.
And I do not have anything against "special people" in media. This can be helpful, even, if done appropriately, by being sure to present kids with the REAL AND RELEVANT paths on how to attain this specialty (if it isn't real and relevant its just escapism). What I critique is the role that medias self-reflection plays in the world and in the past that is problematic.
To come back to the actual post: Who originally started to view cottage living or working class farm life as cute and WHY? Was it truly our grandmas and grandpas? Or was it people compelled and organized to sell historical-fantasy books?