Why do all countries just drive away pirates instead of killing them when they encounter them?

Countries have different attitudes towards pirates, but this does not mean that they will all be driven away. For example, South Korea, India, and Russia have directly killed pirates when encountering them. The result is the pirates' crazy retaliation: a Korean merchant ship crew member was "ripped off."

First of all, how to identify pirates before they launch an attack is a big problem. If we check one by one, it is impossible in terms of time, economy, manpower and material resources. It is also difficult to attack warships and aircraft, and kill pirate speedboats, and it is not economical. For approaching speedboats, you can't kill them with one shot, they will all be called pirates. Among them, there are also real fishing boats, which India has killed by mistake. Not to mention, the consequences of wrongful killing (pressure from public opinion, morality, international image, financial compensation, etc.) are unfair even to the victim.

Secondly, there is no legal basis for killing pirates (before launching an attack, they can only be called suspected pirates). There are no relevant clear provisions in international law, and there are no relevant laws in each country. This is the biggest reason why most countries take deportation measures. For example: a thief is looking around in the mall, but you can't catch him until he steals something. This is also the case with pirates in Somalia.

Third, pirates are also human beings, and most of them are forced by life (only a few are extremely vicious). Under normal circumstances, they are only for property, and their crimes do not lead to death. All countries will not let go of the most vicious pirates, but in recent years, there have been fewer and fewer pirates who deserve to be killed.

Fourth, Western countries led by the United States, for their global interests, will not kill if they can. With pirates in this place, all countries can legitimately send troops to show their military presence. Over time, it has become a world practice. Our country also follows this practice, which not only improves naval combat capabilities and tests new equipment, but also provides good reasons for navies of various countries to conduct transoceanic operations. This situation is called "raising bandits to respect themselves" in my history.