Isn’t this a priori a good thing to know? Is the universe where we can’t accurately determine these numbers a better place to live?
It's often the case that overall prices fall. For example, by keeping prices similar to what airline tickets used to cost for business customers, airlines can reduce the price to others and increase the number of flights, increase efficiency, and provide a better level of service.
Companies have always tried to maximize their revenue. It might be faster now but the process is no different than your local supermarket messing with the price of toilet paper every few weeks.
The innovation in that cheap capital has rolled up industries. It’s easy to keep meat prices high when 3 companies control 80% of volume. In past times, you have dozens or hundreds of suppliers who controlled little regional niche markets.
If I were to develop a retail product, when it came time to put a price on the package, you can be sure that I would collect data to see how much people were willing to pay for the product. That’s hardly “stop-the-presses!” headline news.
I know this article is about price discrimination or market segmentation, but those topics aren’t secrets either ( https://www.joelonsoftware.com/2004/12/15/camels-and-rubber-... ).