They aren’t. Simplest answer.
Andrew Oldham became their initial lifeline that would guide them through arguably, their most creative period
Explanation:
Andrew Oldham was the long term manager of the Rolling Stones who had been instrumental in the current formation of the band and had managed them into a major success.
By the time of 1967 most of the band was involved in a devastating drug abuse case and had been burnt out after the bad reviews of their last project.
This was accompanied by their own burnout with their rock style and Oldham then insisted that the band get back to their basic sound as a young band which they did and defined the sound of 70s popular rock.
