Thanks for the link, will check it out. I note however that Walker has responded to the criticism (https://sleepdiplomat.wordpress.com/2019/12/19/why-we-sleep-...).
But it also looks like he ignores some of the more damning accusations, like cutting out parts of graphs that don't support his theories, being incorrect that the WHO has declared that we have a "sleep loss epidemic", and questions about where he actually earned his PhD (which he seems to continually misrepresent).
So yes, he seems to have responded to the criticism, but IMO not really addressed it to a satisfying degree.
Not saying that perfectly describes Walker, but the evidence does seem to point in that direction.
If you still want to trust someone like that, I guess that's your prerogative, but... well, that sort of thing doesn't seem like a winning strategy in life.