Think of inner game as the roots of a tree. Your skillset, appearance and body language are the tree itself. Your results with women would represent the fruit. Brad P Secrets of Inner Game covers 18 issues that typically trip up aspiring pickup artists. If serious inner game issues go untreated, working on your outer game doesn't do much good, and you either won't have any fruit or it will be disappointing (e.g. fat chicks, psycho chicks, etc.).
The nature of the seduction community tends to attract socially unadjusted men who believe that sex with hot women will solve all their problems.
The truth however, is that to get the hot women, you first need to deal with your own issues. Clever lines and routines may work as a band-aid for awhile, but to land and keep a ten, you have to become a ten yourself, and fixing your inner game is the place to start.