It is an analogy, designed to shine light on the absurdity of believing in Russell's teapot or Sagan's dragon.
The humor in FSM simply aids in the memetic propagation. The teapot and dragon are not nearly as well known, bereft of humor as they are.
And we note that you're still evading the valid point of FSM by picking at style of delivery.
whatever they may be, they are literacy tools that certainly require some clear comprehension of that they are seeking to draw parallels to
iow I think you have given yourself an extremely difficult task if you think you can start offering justifications for analogies bereft of any comprehension of what you are seeking to qualify (regardless whether it is merely for the sake of parody or not