I'm going to share a different perspective.
I used to be really thrifty and responsible. I never spent money on handbags or even the more high end department store clothes. I paid for my college education and graduated with no debt. I was a lot like my father who was a provider and thrifty all his life. But when he was betrayed by someone close to us who blew half of his retirement savings, it turned my world view upside down.
Now I believe that money is not permanent. Yes, it is important to save for retirement and to be self-sufficient. But don't count on that money to always be there. If the money you have now affords you luxuries that make your life enjoyable, go for it. Who knows if you get to enjoy life tomorrow?
That is such a shame, so sorry that happened to your father and your family. I do know the essence in which your speaking from, similar to those who find they are terminal... no need to be careless but to some extent living for the moment is important too, life takes some rather odd and unexpected paths sometimes.