I think the figures *might* be true.
I think also we *do* live in a 'throw away society' and the housewife role (whatever your perception of that might be), as we might have known it, has disappeared, in the main. This is dependent upon which generation you belong to, of course. I also think that many younger wives of today have no interest in cooking a meal from scratch, let alone recycling 'earlier' meals, & even if she did offer to recycle, it would be met with some sort of disdain.
I reckon the microwave has become 'king' mainly, (see how many shelves are full of ready-meals in any supermarket),with take-aways coming a close second. Nutritionaly they are crap, as we know, and can be factored in to high levels of obesity. Seems that we have all become lazy, tired, and wanting a quick fix to everything, and that includes food too.
If this is the case now, what chance do their kids stand in becoming self sufficient & being able to fend for themselves in the future?