> This logic does not hold up. Let's say you sell hammers, and a person walks into your store and says 'I'd like one hammer please — I'm going to go bash my friend's skull in'.
In this case, you've equated two things because they can both cause some amount of harm, but have ignored the quantity of harm, the existence and quantity of positive benefits, and the presence of stated intent.
This is called a "Faulty analogy" or "False analogy": https://examples.yourdictionary.com/false-analogy-examples.h..., https://www.txstate.edu/philosophy/resources/fallacy-definit...
In this case, you've equated two things because they can both cause some amount of harm, but have ignored the quantity of harm, the existence and quantity of positive benefits, and the presence of stated intent.