I would think the requirements of a pipeline in the ocean filled with gas would have appropriate redundancies, safety measures, monitoring, etc; and that a professional engineers would be able to design a solution that would not require us dumping gas into the ocean. If it is too complex to design something that does not leak gas into the ocean, maybe we should reconsider the risk vs reward and our requirements. Just being an armchair, I would guess someone 'saved'
some money on the design and they were not an engineer.