So the whole idea of using an oil sucker device for oil changes is not such a great idea, huh?
As usual with things that are more convenient, you sacrifice something else, in this case crud at the bottom of the oil pan.
I use the oil sucker because it is easier to use than removing those plastic panels under the car and undoing the drain plug. When I use the oil sucker, I can dress in a tuxedo, remove the dip stick, insert the tube, then go get a sandwitch and an hour later the oil is all sucked out.
You think I am foolish and should just do it the normal way?