[sciencealert.com]
A New Study Calculates The Number of Black Holes in The Universe. It's a Lot
Black holes are sci-fi. Claims of their existence are not evidence of their existence.
But lots of people love to read sci-fi so lots of it gets published.
Do a search on “what are the most popular forms of fiction?” Sci-fi often comes in second most popular.
Then do a search on “what are the most popular forms of nonfiction?” Science is usually in fifth place or lower.