Used coffee grounds have many more uses than the plastic k-cups. Recycling the cups is difficult and usually doesn’t happen. They do make eco-friendly cups but they still contain dyes for the labels and require more energy to mass produce than simple paper filters and a bag of grounds (or beans if you grind your own).
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Might be less coffee but it’s not just the coffee that’s the waste; it’s all the extra plastic that each one of those K-cups uses.
Plastic often lasts centuries (at least) to biodegrade and even then animals try to eat the waste and then die horribly.
Used coffee grounds have many more uses than the plastic k-cups. Recycling the cups is difficult and usually doesn’t happen. They do make eco-friendly cups but they still contain dyes for the labels and require more energy to mass produce than simple paper filters and a bag of grounds (or beans if you grind your own).