I actually think this is a moral lesson that needs to be taught more. Too often we are told to "follow our dreams and passions" but we're never really told that those "dreams" are called such for a reason; they're likely not to happen, much like any other dream.
The thing with this girl is she had actually accomplished her dream (being a published author), but she wanted more and was actually unhappy with her life as just an author.
I've read a bit a head of this comic so far (but this chapter stood out as one I wanted to comment on), something that annoyed me is that the art of writing is seemingly portrayed as something you cannot do with a good work/life balance. This woman COULD have continued writing as a hobby, and just released work every few years instead of consistently - even with another job.
You may have to give up on your dreams, but you should never give up on your passions, and this comic seems to have the later message scrambled into the former.