A valid critique on Design Thinking. I don’t agree with the description of a designer though. Ideally I agree, yet in practice where are these "critical, speculative" designers, with a deep knowledge of the material, who make ethical choices? I know two of them
https://vvg.gr/tb
That’s why most people I know who do understand the material, and people who do have a critical and speculative attitude, leave the design business to do something else.