The short answer: because the Left has decided that his father is a liability in 2024

Suddenly the media discover Hunter Biden’s crimes. Why now?

You can read the whole article, mostly spent detailing the lies told by this administration to cover up Hillary’s Russia Gate plot, Hunter’s laptop, and the Biden crime syndicate’s activities over the past 10 years, lies that were obvious to all but buried by the media, or you can just go to the bottom line: the Handlers want Joe gone. The order has been issued, and the flying monkeys of the press have rushed to obey.