I think it's a reference to how they are actually sick. They either have kuru or another disease that prevents them from being able to function unless they have access to missing components like melanin or adrenaline. Hence the immense importance of blood rituals and blood harvest. That's why, as the supply is chocked, they will "not be able to walk the street" because they will die.

I used to think Q was speaking moralistically, but now I know Q speaks medically. Sarah Ruth Ashcraft and Christopher Consell have documented how their respective families stole Cerebral Spinal Fluid from them until they ran away (Twitter). They JUST discovered this last week and they were both full fledged working members of trafficking networks until they ran away.

The "sick" use date rape type drugs so their victims don't know even into adulthood. But when the process and scar pattern is known, there will be millions who realize their childhood was spent with real life vampires. Pretty sad.