It is beneficial. It's why you are not currently a popsicle.

Where's my moon suit, I'm taking this stuff to space!

Radiation in small amounts, IE the levels of normal background radiation, is beneficial. Though messing with uranium well... bit too much.

Radical.

Yeah snake oil sales people used to sell products designed to make you healthy, like radiation inhalation treatments and drinking water from vats lined with radium. Interesting stuff actually, and people collect them even, despite still being radioactive.

You can see some of it here if you're interested

People also used to think cocaine and tobacco were healthy, and that draining some of your blood would make diseases leave your body.

People also used to think that God exists.