I bet if you look at the questions Americans ask their doctors they line up pretty well with reality and do not indicate any delusion.
So then ask what is the function of searching and what is the function of news and see if there's a reason why a rational person might look to them with different questions than they ask their doctors.
I bet cancer vs heart disease difference is because most people have a pretty good understanding of heart disease symptoms and treatments whereas cancer symptoms and treatments are complicated. So they need more information about cancer so they search more.
Then what is the function of the news? The news is part of the political process and is likely to focus on problems that require a primarily political solution.
You talk to your doctor if you want to lower your risk of heart disease or cancer. If you want to lower your risk of murder or terrorism you talk to your politician.
News reports are whatever people watch/click/read. Lots of old people dying from heart disease is not news. One person winning jackpot is newsworthy. 100M people not winning is not. Imagine 100M articles about everyone who lost...