Except they are not ends of a sliding scale. Manoeuvre is the use of fires and movement to gain a position of advantage, and attrition is simply the destruction of stuff. Attrition stems from manoeuvre, enables it, and is enabled by it. Attrition can also occur through other battlefield activities, such as barrages, wastage, etc.
Two separate concepts that a shitty theorist confused a long time ago.
What the author is really trying to get at is the difference between positional and mobile warfare. As I said in my first post, he makes erroneous assumptions about why the Ukrainians tended to the latter after first trying the former.