You can’t avoid it – waste.
No matter how thoroughly you scrape your plate, food will be left on it. Same with your glass, silverware, pots and pans, packaging, cutting board, or sink – food will be left on it.
Now just stop and do the math: when you add up all that food that is left behind from buying, preparing, and eating, it might seem like a small amount per meal, but add up all the meals for the whole world for the whole day for generations and – well, you get what I mean.
Sheesh, what a sum.