Because science is reaaaally hard to generalise for the public, and Universities love to put out press releases. Finding someone qualified to go to for comment is not straightforward. They’re not necessarily even going to be in your country. I’m a physicist by background and even when active in academia it was hard for me to understand some papers in closely related sub fields, and that was with working experience in…
Not straightforward for the university press department? What could be more straightforward? Tell the university press writers to go talk to the university researchers they're writing about. If the researchers refuse to cooperate, then don't write the press release!