“ Human dignity does not depend on a person’s abilities”
I mean, this is just begging the question. Many people disagree with this and disagree with the notion that humans are innately valuable. The blog post just seems like a lot of copium from somebody who really hopes he’s right.
Citing Genesis and an Encyclical might strengthen one’s argument for a particular demographic, but for many it will simply be unconvincing.
Like citation sources, no doubt some humans are valuable but whether they are or not is often relative.
> "Human dignity does not depend on a person's abilities"
That should be a hard line no one is allowed to cross. If you do, no logic will keep you from ending up in a very bad place.
For instance, I'm a big fan of Terry Pratchett's Discworld stories, where his humorous and compassionate tales comment on much of human experience. It's a fantasy world with wizards, trolls, dwarfs, vampires, etc.
In one book he goes into ghouls - obscure, despised and persecuted almost to extinction, but in the story it is found they secretly make beautiful ethereal music. So a concert is arranged to present the music, and all is well, the end. Except for my doubts - I mean, if they didn't make nice music, then it would be alright to dispose of them?
Benthamite utility has a particularly ugly underside to it, and it is easily converted into "disposal of negative value" of the nastiest kind. Which can only be stopped by a moral hard line, as stated.