Many people are against throwing away of food because of certain principles.

But the irony is of course that in the West most people eat _far_ more calories than they really need, so they are doing basically the same thing.

I do t see the irony at all. You can consume lots of calories and also not waste food that seems like a completely reasonable thing to do to me.

Old people in Japan went through the deprivation of post-war Japan. Not all boomers were raised the same. It is harder for someone who has known famine to accept it is ok to throw food away for fun.

US grandparents think you can buy a house with a part time job, Japanese ones think that you could save a life with a watermelon. Different delusions.