I don’t object to their wanting the sample. In fact, I can’t think of much I’d reasonably expect them to test for that would cause me not to give it to them. But I want them to tell me what it is for.
If they were explicit about exactly what tests they planned to do they would open themselves up to gaming. Better to be non-specific and reserve the freedom to adapt. For similar reasons bodies trying to prevent and detect doping in sports will generally not want to publicize exactly what tests they perform.
I don’t object to their wanting the sample. In fact, I can’t think of much I’d reasonably expect them to test for that would cause me not to give it to them. But I want them to tell me what it is for.
If they were explicit about exactly what tests they planned to do they would open themselves up to gaming. Better to be non-specific and reserve the freedom to adapt. For similar reasons bodies trying to prevent and detect doping in sports will generally not want to publicize exactly what tests they perform.