Answer: no, it is not a convincing argument
Step-by-step explanation:
When the product was delivered it was safe and not defective. The instructions were clearly stated that the individual who uses the product must follow in order to ensure their safety. It is not the liability of the company if the person did not read those instructions and this doesn't prove a product to be defective just because the person did not follow proper instructions.
Eventhough it has a tendency to splash but instructions were given to protect the person from those splashes ; the warning was clearly stated.