Where I grew up, we had a hot water dispenser sitting on the counter in the kitchen all the time, and used drinking hot water (generally in the form of tea) in lieu of central heating for most of the fall and some of the winter months. There exists a use case for the hot water dispenser in the refrigerator - especially considering that it doesn’t take up counter space and you’re (probably) using waste heat generated by the fridge anyway during its normal operation.
Whether you’re going to use the feature is a good way to decide whether you’re going to pay for the feature, yes. But someone has a use for it, otherwise it would never have made it out of market research.
