Although you may not normally have medical problems, the ability to consult a doctor for minor concerns is still invaluable. Problems you may otherwise ignore are now only a simple phone-call or visit away.
More importantly, membership will provide regular appointments to not only maintain your health, but optimize it.  More frequent visits also allow me to get to know you better, and help me discover small changes, that if noticed, can prevent otherwise hidden medical issues from turning into life-threatening ones.