As someone that is overly conscious about my own mortality, and fear of it. I can see it being much more preferable "in the moment" to be oblivious to such things awaiting us. And at times I really don't understand why people aren't afraid/concerned about their inevitable mortality.

However, I wouldn't personally choose such obliviousness. I'd rather know, and perhaps plan for it, and do my best to mitigate it as far as I can.