This is true, most Lean stuff is about actually having a product development plan that also factors in marketing/consumer feedback loops via continuous refinement of a set of hypothesis.
Far too many companies do product development without much of a plan at all and just do whatever the loudest customers are complaining about, some trends in the industry, fickle management ideas, or a similar bug-driven approach even before it's fully mature.
This is an artifact of the general laziness of human beings. Companies are made up of people and most people look for desire paths, the path of least resistance.
As a result, people don't do their homework and then complain that certain methodologies are fundamentally broken. [1]
The mathematical equivalent would be to say that the integers are closed under division because you checked both 8/2 and -10/5.
[1] Not to mention all the straw-manning that's going on. Entrepreneurial science is a mess tbh.
Far too many companies do product development without much of a plan at all and just do whatever the loudest customers are complaining about, some trends in the industry, fickle management ideas, or a similar bug-driven approach even before it's fully mature.