[Silly bit deleted here.]
But I think the problem is deeper really. If you have to make an argument about why the humanities have value beyond pure entertainment (which is really what "why you should read Ulysses" boils down to), you've already lost the war, so why bother fighting the battle?
I go back and forth on this. Sometimes I think that our civilization has taken a major wrong turn in believing only in the technical and eschewing the great shared traditions. Other times I remember that the percentage of humanity who cared about this stuff was always very small.
But let's hear from people who've read Ulysses. For those of us who haven't: why should we?