You can say that about almost anything, then. Your bedroom door: why not throw a thousand at it? You open and close it frequently, and that tiny squeak is ever so annoying. If you greased the hinge it would go away for a few months, but still, how long does a door last? Ten years?

Now substitute toilet for door, and wiping for greasing. Or sink, and running out of room or not having the nozzle high enough or having scratches. Do this a couple times and congrats, you've just paid enough for most Americans to buy a car - which is more important?