Why do they like to tell you mAh, but never power consumption in different states? They'd probably have to call it "mAh per hour" to avoid people needing a sci

Why do they like to tell you mAh, but never power consumption in different states? They'd probably have to call it "mAh per hour" to avoid people needing a science lesson to read it, but still. mAh just says "to achieve our battery life we needed this much energy". It's not that much of an interesting spec on it's own, since it would be better to have less energy drain and less mAh, if we could get the same performance, rather than more of both. It's more useful in power banks, or would be, if they weren't often lying.