True. But guess what, in today's language "bless you" is just as religious as "marriage" to me, to be absolutely honest, the very same people keen to deny the religiosity of "marriage" a religious institution happen to be the same, ready to characterise aggressively "bless you" as ultra religious regardless of anyone's common sense who have witnessed a countless number of non believers use "bless you" to be kind rather than religious.
Can "bless you" be more religious than"marriage"?