>Uber isn’t telling people that their battery level impacts the price. So aren’t they the ones hiding information?

I would support them disclosing it, but the circumstances are not the same as one party is submitting information for a quote and another party is providing the quote. In this exchange, fraud on uber's side would be lying about what the quote is.

>this is purely a negative for consumers

That doesn't mean it is right. Shoplifting being illegal is pure a negative for consumers too.