It doesn't bother me to waste food because I'm used to it. We pitch pounds and pounds and pounds of food each year. And then, there is the pounds and pounds of stuff that never even gets pulled from the garden.
DH has huge gardens and produces much than we can use and even when we give it away we have too much.
So no, wasting it doesn't make me sick or bother me. Our food waste my all goes into the compost in and i recycled that way. That said, any food that we have cooked and prepared seldom goes to waste. I freeze leftovers, we eat them later.
I see people going too far IMHO in the battle of waste:
Not all foods are worth saving. Processed sugary salty crap from stores isn't worth saving. We are not virtuous warriors on waste when we fore junk food through our intestines. I see this at potlucks when people bring purchased foods, the kind that are seldom eaten, and then no one can throw the letovers away. Thee are cries of " oh I caaaaaant waste this!" Sigh
I also see people who "can't stand to see food wasted" go to ridiculous lengths of waste, preserving food has already been produced, and further wasting the earth's resources. My friend will take small leftovers from a restaurant some for her dogs using up lage plastic containers tha she throws away when she gets home. Ouch, THAT is wasteful. I would wrap it in a paper napkin.
This same person orders a pizza at home, eats two slices, and uses up several hunks of aluminum foil for wrapping. She will not re-use the foil, and she seldom eas the pizza, but she feels compelled to wrap and save it due to a food waste obsession that people seem to have.