system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is deep sea exploration so difficult? We have had the technology for a long time, has it reached some kind of plateau that scientists cant figure out?
gpt
The difficult part is getting the funding. The engineering has been figured out for a long time, but no one has quite figured out how to finance non-military applications of it.

Historically, exploration has been dependent upon either political will or financial incentive. At the moment, both are lacking with regard to deep-sea exploration.