Buying Life Insurance is where you bet that you will die before you pay sufficient premiums to compensate the Life Insurance company for their eventual payout, and if you die early then you have won the bet. Medical insurance works on a similar logic where it becomes a worthwhile investment only if you need extensive medical care during your lifetime.
In our case we have just 'won' back approximately seven years worth of top-level Family Cover insurance premiums through Melanie Rose's five week residential in the neonatal intensive care ward last September. The stay in intensive care is SOP for all premature babies until they reach a gestational age of 39 weeks and fortunately there were no complications so she was released on schedule.
I hope that all of our future medical insurance premiums are just pure profit for the insurance company.