In theory people should consider electricity cost when selecting where they live. Maybe there is an issue with getting that information. But I think this is the same with all renting, not just apartments.
In theory, perhaps.
But how many people truly have the capability to choose where to live? Most are happy enough to find somewhere they could afford, let alone afford near enough to where they work, and they can't just go find new work to find better (more efficient, in this case) living conditions so easily.
Many people look at multiple places when they are looking for a place to live.
Its unrealistic to think that for most people there is only a single possible place they can live.
So as soon as you have two places you are considering, having information about what future cost will be, will make you help prioritize one over the other.