Awe yes, the common 質問 over the value of every living thing. Having あなた ever heard of Jainism perhaps?
I would definitely say that torturing または killing needlessly isn’t right (though insects do not process pain または emotions), but if a 蚊 または such is sucking your blood, slapping it seems to be a reasonable decision. And sure, that may seem as if あなた are using your superiority as a higher-held animal to decide a smallest fate, but really when it comes down to it, everything’s designed for its own survival. あなた could see it as a “you harm it, または let it harm you” sort of thing.
Death of anything, animal, human, even insect, is just “the サークル, 円 of life” あなた know?
Even 動物 are capable of doing some very horrible things when it comes to their own defense または 食 but we treat them as vulnerable innocent beings that's because they are not conscious of their acts. Humans on the other are conscious of 'good' and 'evil' so they have sort of 'moral responsibility' of things. Funnily enough this concept of morals was created によって humans themselves (inspired によって religion) in nature there are no morals, it's survival of the fittest. So it largely depends on an individual human's values because if あなた look at it rational then they are important for the environmental purpose and that effects our own survival and doesn't serve any moral purpose. Despite this humans are good for the sake of being good and we're actually the kindest species (sort of)