> But you don't really pay the plumber for putting a new gasket in.
> In fact, you don't care about the gasket, you care about not having you sink leaking.
I care about the gasket. If I want the sink to not leak then one way is to not use the tap/faucet. There are countless ways to fix the problem of your sink leaking, but only very few that you really want. Knowing your problem is important so that you don't waste time and money on charlatans. I care about the damned gasket.