Your point is well taken. It does, however raise the question: How much is enough to self-insure?
As we age here in Thailand, it seems that health insurance premiums rachet up every year. And they're only too happy to slap exclusions on your policy whenever they can.
We've asked this question of several ICU nurses we know--in both public and private hospitals. For emergency services and many surgeries, I wouldn't self-insure for less than 500,000 Baht. And would feel comfortable with 1,000,000. in a health savings account.