The reason this is mildly funny is because it represents stereo types. I, too have witnessed many brethren prepare a lesson during sacrament or simply read it from the manual--But I know that more than 90% of the time my husband spends over an hour preparing a lesson (less than I do? maybe) and I have had several brethren teach Gospel Doctrine who have obviously prepared nearly every week and apologize (as do the women teachers) when they have had a particularly bad week with no time to really prepare. I have also had many relief society teachers, who no matter how much time they spent, still only read the lesson or had slips of paper for other to read the lesson directly out of the book. As a person who taught early morning seminary for many years I appreciate when anyone prepares for a talk or a lesson and I do a lot of praying when the teacher has not.
i have worked in a Ward office for years.
I have lost track of how many times the High Priest of Elder Q teachers come in on a Sunday and has to prep and print their lessons.
I have never had a Relief Society teachers have to do the same.
It could be the 4 week prep the Sisters do