Why are they catching sharks?

I mean same reason you catch other fish. To eat or for sport. This was for sport. They turned them loose. People do it. I have caught them, but only one on purpose. She didn’t know them. Just happen to be walking by when they were catching the first one. Stayed around awhile and they latched into the Tiger a short time later. It took both boys a long time to get it in. She said they had to sit down on the sand and dig a hole to anchor their feet in to keep from getting pulled in. They made the comment that it was the biggest they had ever caught.