I used finger cots when I worked in the restaurant business. I had to use a lot of sharp knives and bladed kitchen tools, so I would cut myself from time to time. A bandage or gauze pad would help with the cut, but I couldn't go back to handling food unless I had a more waterproof solution. That's when the rubber finger cots became very useful. I could cover the injured finger and bandage with a finger cot and keep on working.
Sometimes working with full vinyl gloves would become more distracting than putting on a few finger cots on the right fingers. I could keep a better grip on a knife while protecting the ends of my fingers with the cots.