Some people worry about death and taxes. Yet the imperative from from Yeshua is not to worry, since each day has “enough trouble of its own.
Worry and stress can and do shorten life, so I don’t believe Yeshua was sharing a facile piece of advice here. He was speaking a kingdom reality. And a very practical one at that. Why worry and stress out over things that haven’t happened yet, about mere possibilities?
Far better, I believe, to deal with each day as it comes, exactly as He tells us to.