It’s not an unpopular opinion but it might be a tankie shitpost. I just really fucking wish people would explain their reasoning rather than just blatting out a stupid idea. This one isn’t stupid, per se, but if you want actual feedback you should say why you hold this opinion so people can tell you where they agree and disagree and it’s not just a downvote fest.
Having said that, this is the least stupid of a series of incredibly vapid posts, so I’m writing a response.
Yes, there is a supply/demand relationship. Let’s say you make 50 widgets a year and sell them for a dollar. Then a new use comes out for them, and people are willing to pay two dollars (this is actually the story behind the kong dog toy coming from a VW part). So now you can increase production, but eventually you’ll run out of customers, so you can reduce the price to $1.50, and so on. You can see this happening in real time in commodities markets, where oil producers will cut output to drive up prices, or increase it to drive them down (eg if they want to reduce oil production in other countries).
Where you’re not wrong is that it’s a highly idealized model, like a lot of basic economics. It works best with commodities, but we’ve seen it with video cards, hard drives, cars, and so on. However, the more complex the market, the more factors beyond supply and demand are involved. There are things like sticky prices, information disparity (look up a paper called “A Market for Lemons”), and biases like those that won experimental psychologist Daniel Kahneman the Nobel prize in economics.
Just to get it out of the way, I picked Capital because it’s extremely popular as well as being legendarily difficult to read. You could probably do Origin of Species pretty easily - I think it’s actually pretty accessible - but there’s no reason to read it at this point unless you’re a biology nerd with a fetish for history. Evolutionary biology, fortunately, has advanced significantly in the past couple of centuries. If you actually are interested in Capital (both as an artifact of its time as well as being a brilliant critique of the system that was starting to hit its stride), I recommend David Harvey. Harvey has several video and text based courses on Capital that make the ideas accessible and make sense both in the context in which they were written and for our more modern understanding. A lot of his work is freely available on YouTube and the web. 
But moving on from Marx, you might benefit from a course in literary analysis. Again, it could be an ebook or a video, but it might help to develop a framework for understanding literature around either a specific period (eg early 20th century versus post war writings) or topics or literary movements. What I’m saying is that if you read scholars who studied Walt Whitman in addition to actually reading his writings, I think you would get closer to what I think your goal is.
In any case, I wish you all the luck in the world and hope you make some remarkable discoveries. I’ve taken multi-year sabbaticals where I did little outside of reading, and I always came out of them with far better growth than a decade of work at a desk.