I would say it really is not debatable. With gloves you are more protected then without.
Well they don't supply us with tasseled gloves so that spinning drill thing is not much of a problem.
. There is always the rare case were safety equipment does more harm than good. But if your a money guy ya gotta go with the statistics.
For us the most common cause of lacerations came from handling sheet metal light fixtures, you know troughers and strip lighting.
I would say that if someone has access to statistics, it would be debatable and the fact that those companies accept fingerless gloves proves that people realize the rule is silly since it's all about conforming to a rule rather than mitigating a hazard. Without statistics, we can only conjecture that gloves increase safety in all situations. While that might seem logical, it may not be. I wasn't wearing tasseled gloves when my hand got pulled into a SDS bit. I was wearing rubber coated cloth gloves and it was the rubber coating that snagged on the side of the bit. Leather gloves wouldn't have snagged on the bit, but they would have lowered my dexterity. There are trades-offs to many safety measures you take.
It's all about using adequate protection. Rubber liners and leather outers really reduce dexterity, but for hooking up a service hot the benefits outweigh the discomfort and slower working pace. For working with sheet metal products, heavy cloth or light leather or even fingerless gloves might be appropriate. For using a rotary hammer, there isn't really any safety reason to use gloves, so their use would be debatable. For installing devices, gloves might lower your dexterity to the point where the work becomes almost impossible. Fingerless gloves would offer you dexterity, but what protection do they offer?
Gloves, like any other product, can be had with safety ratings. Not all gloves have them, because not all gloves are for safety. A hazard has to be identified before you can offer a rating, then a product needs to be tested to measure whether it protects against that hazard. Any company that issues a blanket requirement to wear gloves has omitted that stage of performing an analysis, identifying a hazard and specifying a protection level to mitigate that hazard. It's no different than a rule that states that all males must wear protective cups on the job site. It's not only lazy, it's sloppy safety management.