Weight requires a scale. I don’t know a single American who has a scale in their kitchen.
This sounds like a catch-22 problem.
Maybe scales could be improvised, with a stick, some cups, and awkward-shaped chunks of chicken in one of the cups.
Or, we just use volumetric measurements, despite the slight variations they introduce when you cram pack flour into a cup instead of gently scooping the sifted. It’s a kitchen, not a laboratory or a factory.
My first example was “a cup of frozen chicken strips”.
I know I can make a guess how much they mean, but I could easily be off by a factor of 2.
It really wouldn’t be hard to have the weight listed.