No it’s definitely about the flashlight more than the batteries. Most flashlights just have one connection/channel from battery power to bulb, and if this single circuit fails at any point then the flashlight is useless. This flashlight has four separate ones due to the layout of the batteries, and they each operate individually, so if one fails anywhere you still have 3 that function just fine.

How do you know if a battery has died? If three batteries have died and the flashlight keeps working as normal, then one day the fourth battery finally dies and the user is surprised to find the flashlight suddenly won't turn on. This sounds like using a normal flashlight?