You have a veyr good point here. Sadly many people try to sell design thinking as a product without digging into its underpinning philosophy at all. This is driven by many business and egineering schools that tend to turn it into a creativity-making machine. Again sadly, it doesn't work. In order to benefit from design thinking, it is important look at it from the perspective of problem framing before the solution framing. You can check the Frame Innovation by Kees Dorst, who is built on the philosophy of Thomas Khun.

Another thing is that design thinking is sold as a process where we as desigenrs never think this way. The IDEO drove this approach to make it easy to understand. This is why I teach my students that design is an arena where all the factors and stages blend. You can check the last paper in the article about the Memoranda and Artfect as it sreflects on other proceeses such as the Agile.