I dont' agree. My guess was she was probably using my logic, of what I have more of, cash or miles. I have hundreds of thousands of miles, I don't have hundreds of thousands of dollars. I've taken flights using miles when I knew I could have been going someplace way different, but it was because I had the miles at the time, and not the cash.
The value of the miles isn't in how far you can go with them. The value in these miles was that she used them to spend Thanksgiving with her family. Then again, you probably can't put a value on that at all.
You can't fault somebody for using miles to visit the family for the holidays, no matter how silly of a trip that was.