Technology

Not all lithium chemistries have fire issues, and lithium isn't the only chemistry on the horizon. Oceanic lithium sources are basically indefinite--there's more than we would have a use for. There are also alternative extraction methods that open up more economical sources ("mineral reserve" means the economically exractable sources, not the complete total amount).

Recycling products like this will work when there's scale to justify it, which there will be in about a decade. In fact, we don't necessarily need to fully recycle it. Cells that are no longer useful for cars can still be useful for general storage, so we'd reuse rather than recycle.

Hydrogen is a dead end. Inefficient and would require a totally separate and unnecessary set of infrastructure from battery charging. Why pay for two sets when one will do?

If you're using an argument against EVs that's repeated on the right, it's almost always bullshit. If it's an argument unique to the left, such as how cars have created terrible cities and EVs don't fix that, it's on much better ground. That's not relevant to busses, however.