It's been clearly shown to be beneficial for some people. I too happen to be one of them.

For others, hearing stuff (and saying stuff) out loud is more useful. I had a friend who'd make nonsense songs of stuff to learn: just doggerel, but by singing it to himself when revising, he had a massive uptick in retention. He was so happy when he worked that out.

I imagine there might be other modes that work for other people too?