If people knew how the stock market actually worked then you would see far less retail investors losing their money. Many people think it's equivalent to gambling and that it is a zero sum game. There is also the common misconception that stocks that don't pay dividends (e.g. they do stock buybacks) can never actually return their investments and therefore every investor is looking for a greater fool until the stock plummets. Lots of people think buying the stock from another investor does nothing for the company unless they issue new stock for financing purposes. Obviously, if you knew even the tiniest bit about the stock market you would know that all of these are wrong.
Stock trading makes money and produces value by providing liquidity but it has diminishing returns therefore it is slightly positive sum. Stock investing makes money off of company growth. Investors can sell their shares via stock buybacks directly to the company (no greater fool needed). Buying stock from another investor increases the market cap of the company which helps it secure funding through traditional means such as a line of credit from a bank even if the company does not sell stocks.
No one on this planet is going to teach you this. You'll have to figure it out by yourself and this is merely information an outside observer needs to know to understand news articles regarding the stock market. Actual investment requires far more in-depth knowledge.