He is for some reason comparing the levelized cost of energy. This is a metric used to analyze energy generating devices, not energy consuming devices.

His tweet says that if you wanted to buy electricity from an electric scooter and use it to run your house, it would cost the utility providing it $2 to $5/kWh, assuming that the sole function of the scooter is to provide its electricity to consumers directly.

LCOE goes up the further you get from the source, but his analysis is also based on outdated numbers and largely wrong.

That said, he isn’t totally wrong. Electric marine has a tough road ahead of itself due to the inefficiency of boats relative to cars. Boats can be calculated roughly as a car that is always going somewhat uphill.

Electric planes are a niche use case for the foreseeable future.