We all go there and having been in dangerous situations and seeing others almost loose their lives makes me make choices wiser and be thankful for the good in my life. I don't know if I would be as happy as I am if I wasn't aware we can loose it all very fast. On the other side knowing you and everybody else will die I wish I was the old ignorant version of myself sometimes when I didn't worry. But back then I was wasting so much time on anger and stupid things.
I hope you had priceless joyful moments with your Dad and maybe some are still to come. I know many who don't even have a Dad so I congratulate you to this long time experience.
Best Wishes!