We have these sorts of discussion for any positive right. If people have a right to food, what kind of food? If people have a right to medical care, what kind and how much? If people have a right to education, what does that mean in practice?

We also have similar discussions around many negative rights. E.g., in the US 4th Amendment rights are subject to all sorts of practical limitations.

That rights are complicated to implement doesn't mean that they shoudn't be rights.