Indeed, the article only deals with the way in which wanting is not enough when conflicting desires coexist, defining what seems to me a conceptual and methodological simplification/oversimplification (taking desire/wanting as an indivisible whole, preventing the analysis of possible coexisting conflicting desires).
However, the first version of the article was more ambitious and dealt at the beginning with the possibility that MAYBE ultimately in ALL “wanting but not being able to” the “not being able to” was ALWAYS due to forms of not wanting (such as those analyzed in the article).
Then I doubted considering different physical and psychological cases (from the impossibility for someone to do certain physical things while having a certain disability no matter how strongly he/she wants to do it, to psychological cases, including scenarios equivalent to wanting to be rich vs. being able to be rich, not wanting to get cancer vs. not being able to avoid it, etc.).
Ultimately I had to analyze/consider the boundaries of agency, so fortunately I gave up and circumscribed the article much further 
So these ideas and your answers to Ricks’s comments about this, have to do with the ideas expressed by Rick here:
And I was just going to ask @Rick if he could develop/exemplify them. ¡BUT NOT HERE! 
Here is better: FEELING GOOD ! The What, How, Where, When, etc. of It?