I don't understand why people seem to be so befuddled by the concept that there can be legal actions which are not ethical or moral. I can legally buy a new pup

I don't understand why people seem to be so befuddled by the concept that there can be legal actions which are not ethical or moral. I can legally buy a new puppy every month and give it to the pound. This is morally wrong, even despite agreeing that giving animals to the pound should be legal. I see this same argument constantly, in nearly every discussion about a company doing anything bad. It's a meaningless point. Do you people posting things like this really not understand the distinction between right and legal? Or do you think moral considerations are beneath discussion?