Good question, Alice.

Proteins (enzymes) cannot be absorbed directly anyway. They are broken down into their various amino acids. Those amino acids are absorbed and then we reassemble like we want them in our cells based on the genetic information that is transferred to our ribosomes via RNA. So why would we want to eat an enzyme that we are only going to destroy? And what difference does it make whether it is denatured in our stomach or on our stove?

If you wanted to get a whole protein into your body, you could inject it. That would, of course, start a whole big immune response. Now we are back to square one which is a screwed up immune response...............