Cats don’t bite humans because they are animals and do not have human language capabilities. Although some cats will learn to meow or make other sounds to express their emotions or needs, this is not truly "haha". Cats usually express their emotions or needs through body language, such as wagging their tails, opening their mouths, showing their teeth, etc. They may also make various sounds to express their emotions, such as meows, shouts, grunts, etc. But these sounds are naturally made by cats, and are not "harsh" sounds in the true sense.
To sum up, the reason why cats do not bite people is that they do not have the language ability of humans and can only express through body language and sounds. their emotions or needs.
