Oh using multiple accounts then?

Nope, multiple people disagree with you.

Or pasta strainer, you keep the pasta.

You’re also supposed to keep some of the water to thicken the sauce typically

You’re trying to ignore common day parlance.

And you’re ignoring the gravel sieve example where everything is kept, because it’s inconvenient for your argument.

Well, unless you used the strainer/sieve to get and keep fine cake flour (the water in your analogy) from coarse flour (the contents).

Or like in the way they use sieves to sort gravel. They keep all of it.

My point is, direction is relative.