I think they should be, but even if they aren’t, there still is the observation that a kWh of electricity often can produce more of what we really want (light, motion, compute power) than a kWh of oil (about the only thing we can efficiently convert that into is heat)
For example, Google tells me
- petrol is about 12 kWh/kg,
- the modern fiat 500 has a 47l gas tank,
- Tesla sells cars with 50kwh batteries.
Yet, that Fiat doesn’t have ten times the rang of the larger Tesla.