Sounds more like anything goes to save Dr Strange's rep... but whatever I guess.
It's not hard to see that someone who's literally starving to death would be more susceptible to mind attacks... plus, the funny thing is Xavier showed Galactus all the feelings of the Skrulls when he was in better shape and he didn't bat an eyelash... and then returned their hatred instead. Are we supposed to believe that Strange can essentially one shot a full powered Galactus by showing him the pain of others?