Some existential theorists and practitioners (e.g., therapists) have argued for a positive kind of anxiety, vs. a destructive kind that paralyzes and kills us. My long interest in these discourses on anxiety (another word for fear)--is a troubled one, where I have critiques of the way the existentialists deal with fear and this binary. That said, you can check out this quote (from a brand new book by Schneider) on his viewpoint--short extract below:
[note: "Becker" is highlighted, as he is my favorite of the existentialists, and that is Ernest Becker--of whom, was the philosophical
thinker beneath the 1980's social psychology project of Terror Management Theory, the latter also well worth investigating if you
are at all interested to know more about "fear" in the social realm of behavior.]
[quote from p. 5, from Schneider, K. J. (2023). Life-enhancing anxiety: Key to a sane world. University Professors Press.]
Addendum: