I notice that Wallace constantly (in my interpretation) shows the medical (specifically psychiatric) field as relatively useless and foolish. I find it highly amusing, even on a personal level, but at the same time I silently ask the author "why do you dislike counselors so much?" Not only are tons of characters addicted, they also can't seem to get any decent professional mental help. I'll list the things that make me think of this as a theme:
-Hal's father had that whole "professional conversationalist" stunt that sort of set up a lack of faith in the title "professional".