Imagine for a moment you are sitting there, reading this comment, and a stranger comes up and sticks their finger up your nose to look for a bogie. They've just done something that minimally inconveniences you for their benefit. It probably didn't do you any serious damage and almost certainly didn't kill you. When you ask, 'what the fuck?' they say 'I don't think sticking my finger in your nose is as big of a deal as you make it sound.' You didn't do anything to them. They just decided to do it because they wanted it right now rather than waiting to generate their own. Do you really think you'd take such a philosophical view as to say 'Oh, well. They, legally, should have just picked their own nose and not invaded my physical space, but it would have taken them time to secrete that mucus so it's fine.' I doubt it.