To use the handkerchiefs?

I wondered why some people used handkerchiefs in their daily life? Wasn’t it more hygienic to use disposable tissues? I thought it’s very inconvenient to use handkerchiefs because I needed to wash them after using them everyday. I knew it’s a way to be polite. The teacher always told me when I was in elementary school. I surfed the Internet to find some benefits for using handkerchiefs. One of the benefits was that it wouldn’t be so wasteful to throw tissues after using every time. It’s a good way to protect the environment. Maybe it’s also good for me to buy a handkerchief. Therefore, I didn’t need to throw many tissues after I washed my hands.