- You are right.
- It is not financially feasible if you only need 1 or 2 vials.
- Even if you do it, it is not guaranteed that the untested vial from the same shipment has exactly the same content.
- The test may fail in different aspects: identity, mass, contaminants, a little off or a lot. It all changes how bad the product really is.
Conclusion: it is not a categorical difference, it is about higher and lower probability of getting a better or worse material. The cost is also a factor, so we are talking about a risk level that people are willing to take, and that's their decision.





