It's the fact that the US, Canada and UK are throwing immense resources at several "risk taking adventurer" millionaires while countries ignore those taking risk in search of just the opportunity for a better life.
The reason that many are interested is the allure of rich people doing rich people things. I mean a father paid $500,000 for he and his son to travel down 12000 ft to see a ship wreck that holds no real value other than to say I've seen it.