I think the benefit or non-benefit of amylase is debateable. Amylase is a natural enzyme within the body that digests food. Others include protease, lipase, cellulase.
•amylase – breaks down carbohydrates, starches, and sugars which are prevalent in potatoes, fruits, vegetables, and many snack foods
•protease – breaks down proteins found in meats, nuts, eggs, and cheese
•lipase – breaks down fats found in most dairy products, nuts, oils, and meat
•cellulase – breaks down cellulose, plant fiber; not found in humans
On this list amylase is probably the one I need the least, but there are a ton of potential foods/fibers within my gut that have not been digested yet. I am not worried about it, I probably need more enzymes to digest my food!