The short answer is, "They seek short-term satisfaction and ignore the long-term consequences."

Plagiarism may not be illegal in one's country, though it can mean the end of one's academic pursuits or any hopes of maintaining a career in journalism (go to https://en.wikipedia.org/wiki/Plagiarism for additional details). Also, being caught using another person's work without giving due credit could expose one to internet ridicule.

A student's best bet would be to either find a trusted friend with a knack for writing or hire an established writer to provide proofreading services and useful writing techniques.

If you or your fellow students are interested in a less risky and more beneficial alternative to plagiarism, I would be happy to provide guidance for crafting well-written papers in English.