The altruistic activities of the Hanso Foundation seem to be mythical, as mythical as unicorns, Girls Gone Wild in Nebraska and leper-chauns*.
The island appears to be a vast Skinner box for studying methods for controlling people, but one that has not slipped out of the control of the people who started the project. It is just supposed to appear that is has slipped out of control.
All the different complexes were just part of this system, and the damaged and destroyed ones – along with the supposed accident way back when, and the Others – are all just red herrings and red herrings.
Meanwhile, back on the mainland, the masters of the Hanso Foundation keep watching what is going on, pulling strings and tightening the screws on people, all for the sake of the emotional satisfaction they gat from doing this to people.
Ya got to admit, it would be entertaining to drive a man mad by terrifying him that if he does not reenter some number over and over and over.
I don’t have any real theorizes about why Hanso and his associates chose the people they did, but I do think I’ve got the island figured out more or less.
*Everyone knows leprechauns are immune to Hanson’s Disease.