Technically, it may be easier to explore the moon then the bottom of the oceans.
We only live on 20+% of the surface of the earth and people talk about the need to colonize mars. How about we spend some money and start exploring the other 70+% of this planet first?
The oceans may hold secrets that may save humanity.
On second thought, we shouldn't explore them. Forget I mentioned it.
The sooner this species can become extinct the soon the earth can recover.