While I do consider myself extraordinarily lucky, it's not because of Trav's voice. If my husband suddenly lost all vocal ability, it would have zero impact on my feelings for him, so I always have a moment of disconnect when people hear his music and comment on my luck.
My sense is that in addition to the good fortune of being married to a talented performer, they also mean I am lucky to be immortalized in song. At least, I think this is the bigger intention. People want talents recognized, and Travis occasionally notes mine in verse.
For instance, my pumpkin pie. It is Marjorie's recipe, and it is the best recipe for pumpkin pie I've ever encountered. Why is it the best? Because she uses ingredients that are easy and usually on hand. There's no sweetened condensed milk (nasty, gooey, spoiled-looking stuff), special pumpkin pie spice or complicated directions. Ingredients into a bowl, mix, pour, and bake into a rich custard that tastes precisely like autumn in New England.
The end result is perfect pumpkin pie.