It's relative

I see a poor, malnourished horse with blinders on and head bowed towards the ground pulling a cart piled high with collected cardboard and scraps, and I feel bad for that horse's life which is obviously brutal.

Then I see a similar cart, piled high with cardboard and other recyclable materials, this time being pulled, slowly, by an old man who appears to be at least in his 50s, and I feel bad for worrying about horses.