OK, I found the section on pre-existing conditions, which is for things that you had prior to the initial deposit date or booking date of the trip. I can live with that since I have no pre-existing conditions that would cause me to cancel any of our current trips which we have booked. Now if I had congestive heart failure then maybe I'd be looking for something better, but since I don't I can live with this limitation.
As for the Medicare supplement I know it only covers $50,000, and I can live with that amount.
Yes I know you can buy coverages that have higher benefit amounts but as with all insurance you're gambling, do I pay X dollars thinking that I'll need a payout or based on past experience it's not necessary. Based on my past experiance it hasn't been necessary. So for me the basic coverage provide my the Chase card fills my needs.