The point seems a bit fatuous, a bit like arguing that a modern desktop machine isn't turing complete because there is a finite amount of memory. No, we can't

The point seems a bit fatuous, a bit like arguing that a modern desktop machine isn't turing complete because there is a finite amount of memory. No, we can't reverse entropy, or avoid damage to our bodies. But that says nothing about whether we can slow it down, or do enough self repair, to consider these problems practically solved.