I Captured My Friend Transiting the Sun During a Skydive

It does devalue the image indeed. He didn't cut out the jumper and paste it onto the sun but he did take images of the sun and paste them onto the jumper, using the jumper as a mask. Which seems to me like a distinction without a difference.

If his images were real they would have shown the powered paraglider too. The images are a composite of photos that he took of the sun and a frame from the video that he took of the jumper.

Is it pretty? Certainly! It's art! But it's 'photography' the same way the 'So Yummy' YouTube channel is cooking.[1]

[1] https://www.youtube.com/watch?v=6abePkXncCM

That doesn't make any sense. Did you mean double exposures?

I disagree.

All photos have an exposure time; that's an inherent property of them (think film). Compositing images digitally on top one another is not an inherent property of photos.

You can double expose film, and I think that's a finer line, but I think the distinction most people care about is really analog vs digital.