The issue here is that advertisers... at least the ones with agencies and in-house ad departments... do research and know that trying to sell to empty nesters with life-long buying habits is not profitable. The issue is not radio... stations would gladly program to 55 and over if there were advertisers out there waiting to buy. There aren't.
But I totally agree with you, JoeU, that MeTV FM is principally a promo vehicle for the TV operation.
Both the radio and TV operations are for people who are likely in their later 70's and 80's. I find nothing on either to be attractive as it is "too old" for me.