Probably not all that different from musicians/artists/writers/bloggers who never attain any audience. However, the immediacy of the feedback would be soul crushing.
Mostly true for most academic papers as well. Not just the humanities, but the sciences too. Since you can track how many people actually clicked on the download button for a paper, you can get a sense of how many people actually read it.
Only one of my few papers has ever been downloaded by someone not on the author's list (we can compare with each other). Granted, that one's been downloaded a lot. But still, most of that hard work and going back and forth with editors is for naught.
The difference is creating music, art, writing has its own intrinsic reward. I have a ton of photos on my instagram and barely any followers for the amount I put in. If I was just doing it for the likes, i would have given up on it a long time ago.
Only one of my few papers has ever been downloaded by someone not on the author's list (we can compare with each other). Granted, that one's been downloaded a lot. But still, most of that hard work and going back and forth with editors is for naught.