I have not read the book so I cannot comment on that. The television programme was about the reformation of Hawkwind for some live shows in response to the demand from fans. Lemmy took part, but was unhappy about some of the bizarre decisions, such as having Sam Fox on vocals. It is hard to remember now, but another decision may have been to exclude Nik Turner, prompting Lemmy's comment.
When speaking about the early Hawkwind, Lemmy appeared to be under no illusions about the musicianship and gave the real names of the various devices credited to members of the band (I cannot recall these without looking at my copy of Space Ritual). Nik Turner never claimed to be a good technical musician, but certainly added to Hawkwind's space-y feel. He has worked with exemplary musicians like Steve Hillage, so I cannot imagine him to be completely inept.
In truth, I don't know if Nik Turner is a good technical sax player or not, I just know what I like. My point was that Lemmy praised Nik Turner, but neglected his own contribution to Hawkwind. They were never as good without him. I saw Motorhead live soon after Lemmy left Hawkwind and was disappointed because he was, in my view, the best musician (along with the Bob Calvert). Motorhead were terrible in the early days and I have never been able to get into them since.
One of the few tracks that I like by Motorhead is Hellraiser, the only track on March or Die produced by Billy Sherwood. Their version of The Train Kept A-Rollin' is pretty good and is one of the heavier versions, besides the Yardbirds.