I suspect we agree more than we disagree. But I think that your definition of a "computational process" is too broad. A bacterium does things that we can say are "performing a computation." But that is different from saying that life is, at root, a computational phenomenon.
For instance, sorting a list is a computational process. It doesn't matter what kind of computer I run a sorting algorithm on, if I follow the algorithm, I end up with a sorted list. If I use quicksort, it takes me on average O(n log n) steps. It doesn't matter if I'm doing this on a Lego computer or if I'm simulating a Lego computer on a virtual computer. I always end up with a sorted list in an average of O(n log n) steps.
By contrast, if I construct a collection of chemicals that matches the positions of those of a real bacterium, I have created a new bacterium. However, if I simulate the activity of those chemicals on a computer, I have not created a bacterium. I have just created a simulation of a bacterium. I haven't created a living thing.
My argument is that the same is true of consciousness. If you create a perfect simulation of a brain in a computer, you have not created a new consciousness. You just have a simulation of a brain.
None of this to say that a computational paradigm cannot sometimes be useful in understanding what is going on in life or consciousness. Just that it is not fundamentally a computational process, it's a physical process.