Correct! The ocean will not be extinct in seven years. Or fifty for that matter! The ocean is an excellent environment for biodiversity. There will always be some aspect of life inhabiting it.

However, every year, more irreversible damage is done to the ocean. The carrying capacity of the ocean has long been exceeded by humanity's consumption of seafood alone, never mind anything else that depends on it for resources. In the current century, there has been an extremely worrying downtrend in the seasonal regeneration of sea-life.

Needless to say, every year of inaction is another sprint closer to the approaching cataclysmic disaster that will be the collapse of the ocean as a food source. We need to start slowing humanity's approach down as soon as possible, and seven years is not an insignificant amount of time.