According to some Sam Harris podcast I vaguely remember listening to years ago, publishers generally don't want to publish short (like <200 page) books because

According to some Sam Harris podcast I vaguely remember listening to years ago, publishers generally don't want to publish short (like <200 page) books because they don't make enough money. Longer books are more profitable because the perceived value is higher so consumers are willing to pay higher prices for them, even though they don't cost much more to print. Which is one reason why 90% of "business" books are forgettable wastes of paper that contain one or two ideas stretched out over 250 pages and serve little purpose except to advertise the author's consulting company.