Earlier quoted context omitted.
>Edit: zoom out on the island.. and think about this: somewhere under the green down there there are living people like me and you that do not know what internet is... or cell phones.. or ipads.. cable TV... anything.. Or books, for that matter. Such things probably aren't as important if everybody you will ever have the chance to meet in your life numbers 400 people.
Isn't it just as unethical to withhold modern learning from these tribes as it would be to infect them with our modern diseases?
Besides, what do they need to know that they don't already after living on the same island for 65,000 years? I'm assuming you're thinking about modern medicine but I expect they have their own ways of dealing with illness, and increasing their life expectancy might actually make things worse - the island can presumably only support a limited number of people at any one time.