It is difficult to comprehend such a situation and friends we talked to felt scared about travelling too far away from home. A friend who had recovered from cancer once told me he is too afraid to travel overseas as he might not be able to return home. Such is the situation for old people who worked hard when younger and only travel when the family is grown up. By then they are old.
Medical cost is a major headache when travelling overseas. My brother-in-law has travel insurance but not enough to cover his wife's medical costs in Japan. He has to foot a huge part of the bill himself. It is wise to take up travel insurance for every trip abroad.