It's a question of why notability requirements are stricter on academics than pornstars. A fairly comprehensive list of pornstars will not be super huge, especially compared to academics, and will have fewer cranks trying to push a point of view through those articles. It comes down to a pragmatic point of view, not an actual argument that the least notable porn star on that list is more notable than the most notable scientist excluded from the list.

I personally say let them all in, but that battle has been fought and lost long ago.