It means that a living person has an intrinsic objective moral value.
How do you define and quantify this “objective moral value?” What’s the process?
If this is true, then it is wrong for example to rape a child.
An ironic example for a Catholic to use. Are you in favour of your current pope, who - as the documentary evidence clearly shows - knowingly and deliberately protected priests who did this exact thing?
(what would be truly ironic here is if I got censured or banned for “causing offence” - when the
real, heinous, unforgivable offence was committed - and covered up - by those in a position of trust and authority within the Catholic church)
Every time that you think that it is objectively true that you have the moral high ground you are in fact walking unconsciously in to a fallacy caused by chemical illusions in your brain.
And it is invariably the theist, rather than the atheist, that thinks this, because they believe that their “sacred text” (which is, when all’s said and done,
just a book) is somehow an objective truth.
Religious “morality” is no less objective than secular, humanist morality. In fact, given its self-servitude, it’s probably far
more subjective. Religious morality is based around what a bunch of goat-herders considered right and wrong, thousands of years ago. Secular morality, by contrast, is based on strong and defensible ethical principles.
I’m always bemused when someone holds up their religion as a reliable arbiter of morality, because the evidence clearly contradicts this. Misogyny, homophobia, elitism, racism, oppression, bullying… all these are morally abhorrent, yet are the hallmarks of all the Abrahamic religions throughout history.
In answer to your original question (although I strongly suspect you weren’t after answers, you just wanted to argue the point, futilely, that superstition-based morality has more value than humanist morality) - the atheist has the same “moral rights” (unless you choose to define them in some quirky self-serving way) as the theist. Why should he/she not?