Are You A Waste Of Space On This Planet?

Someone I know once said that some people are a 'waste of space on this planet'. At first I was taken aback by his remark, but it got me thinking about why he said it and is it true that some people are indeed a waste of space? I have come to a conclusion that indeed there are some people who have made themselves a liability to their family and friends, or maybe even society and the planet. But I would not go so far as to say that they are a waste of space...

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