Let's say the chances of a cardial infraction with serious compicationa ate 1 in 1M. But the chances of a similar illness are 1 in 100K. (We could check these figures, I just want a model). And the rough costs to insure a 99.99% chance of survival are $100K in such a situation.
DL's policy leaves you about $70K out of pocket. You have a .001 chance of this scenario. $70K x .001 is $70. That's what you should pay to offset this risk, all else aside; on this analyis, DL is full of crap and selling a relatively worthless product, and $25 for a policy from an actual insurance company seems pretty reasonable.
I hate to beg to differ, but it is not clear that your characterizatioin of Cuba's health care system is accurate. (Perhaps I biased by the current regime's confiscation of family property ... but probably not; I think the case is arguable, however).
Now... who's the highest placed Williams grad in the SEC? Maybe a little tap on the airlines' shoulders is in order.