This is a misunderstanding of what stock buybacks are. Companies do not buy their stock from themselves. They buy the stock from participants in the market.
Following your example, it'd be like the author of a book buying the book they wrote from someone else. If the author chooses to pay someone else 1000$ for their book, they can, but they will be wasting money.
A company doing a stock buyback is trading off their own capital (they have to spend it, it's not an infinite money glitch where they buy it from themselves) to get back shares of the company itself at the then-market-price. The market chooses whether that's a good trade. It may not
Following your example, it'd be like the author of a book buying the book they wrote from someone else. If the author chooses to pay someone else 1000$ for their book, they can, but they will be wasting money.
A company doing a stock buyback is trading off their own capital (they have to spend it, it's not an infinite money glitch where they buy it from themselves) to get back shares of the company itself at the then-market-price. The market chooses whether that's a good trade. It may not