True, but safety is a concern. Batteries are easiest for consumers to maintain safely. The failure modes of flywheels, lifting objects, or pumping water - when not properly maintained - are disastrous in ways that we mostly are not able to handle. Batteries start on fire, but we have fire codes and fire departments so your survival chances are reasonable. Batteries are also something that are available to consumers in a well engineered (well hopefully) package, while the others are a bit of a DIY hack. Electric implies you can connect to the grid and thus offload the whole concern to someone else for a small cost (this applies to the vast majority of us).

In the end you need to consider all the trades offs. Once you do though, electric starts to look good just because of how flexible it is, even if others beat it in any one area.