And solving it is just one of them. This is what I mean when I say “product thinking”, and how skeptical we need to be when we are dealing with things which are often presented to us as “problems”.
First order of business is always to figure out if there is a problem at all. Often times we perceive things as problems, when someone else sees them as features. Something might look like a small problem, but is actually just the tip of the iceberg and an indication of a much greater issue.
Second is to decide how to deal with it, and the author's three-pronged approach is a good set of options. I would say that the third “desolve”—I'm not a fan of this wording—option required the most knowledge and experience to be able to identify and implement.