I am just curious why we as humans have these kinds of expeditions though. Do we go on nature hikes and feed the bears? Is there a difference? Some of these trips take place under the auspice of education, but aren't there better ways to educate without exploitation and creating unnatural circumstances?
We do it because people want to see sharks.
Some people feed bears. Conventional wisdom views feeding bears as more likely to precipitate situations resulting in dead bears &/or dead people. Saw an old 'Faces of Death' video where a guy was dropping food to a grizzly outside his RV, got out to film it, & it turned & killed him. There's hot theoretical debate on whether shark feeding makes potential maneaters more likely to kill us, but there's not as much theoretical agreement on that as there is on bears. Yet, anyway. Time may tell. So yeah, there's a difference.
Auspice of education? It amazes me how our culture is oddly ashamed of hedonistic recreational sight-seeing of animals. If you want to learn about sharks, save time & money...stay home & use Google or order some books off Amazon. Yes, you might make some personally fulfilling observation staring at reef sharks in the Bahamas (not that there's a lack of videos to watch at home), but I don't think that's the primary motivation. People want to see sharks for the fun of it.
Exploitation? Now there's a word that gets used to death in our culture. The sharks don't seem to mind it! To some extent, most any transaction can be seen as exploitation. My employer exploits my dependency on a paycheck to get me to come to work. This issue is whether the shark population is suffering undue harm as a result.
We precipitate unnatural circumstances when we strap on scuba gear & dive. Considering the human impact on shark populations, fish populations & the ocean, I'd say 'unnatural circumstances' are pretty much a given, anyway.
Many people would probably prefer to observe sharks ambling along 'naturally,' but we're told many sharks are afraid of divers & avoid us like the plague. So a lot of folks paying thousands apiece for exotic tropical vacations may not (in some locations probably will not) see sharks at all (much less in decent numbers & close & long enough for a good look at) without the feeding dives. I'm up to around 83 dives or so, the large majority in Bonaire with a few elsewhere in the Caribbean, and I haven't seen a shark yet.
I haven't yet had the chance to participate in a shark feeding dive. I probably would, though. As long as it didn't involve something akin to chumming for great whites near populated beaches or something along those lines. With that in mind, I do think the practice bears guarded, cautious monitoring.
Richard.