Proposals to use hydrogen as a fuel are causing confusion because they think of hydrogen as a source of energy.

In fact, the proposed use of hydrogen is not for generation. It is for storing and transporting energy densely, good for machines such as airplanes which need to minimize the weight of their fuel. A tank full of liquid hydrogen weighs a lot less than a battery holding the same amount of usable energy.

However, we're going to need to extract the hydrogen atoms out of something. If we want to use electricity to power this operation, we will extract the hydrogen out of water, using electrolysis.

The advantages of using hydrogen for storage and transport are entirely independent of how we generate electricity to make the hydrogen. Naturally we should choose the best method for that: renewable generation. Not expensive, polluting and accident-prone nuclear reactors.