Consider you were worried about an upcoming exam, and someone offered you a lobotomy, after which you wouldn't give a hoot about the exam anymore.
Strawman. Note the stipulation in the comic:
You'd have pretty much the same personality as you do now.
This is not at all like wireheading or lobotomy. Care to do better?
Well, I chose a close hypothetical that wasn't self-contradictory.
Consider "you adopt the firm belief that you can fly, but your personality would pretty much be the same", the two are mutually incompatible. You can of course insist that we not change the hypothetical in any way, in which case there's nothing to be said other than that it's worthless talking about it beyond noting its self-contradictory nature.
A hypothetical which works: "You are given one billion dollars, but your wealth status is otherwise pretty much the same."
A hypo...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.