As someone who is really into micro mobility devices, this sounds like it could be a reasonable step.

The lithium ion battery fire problem is extreme. Batteries can be permanently damaged without visible damage. Manufacturing defects in an imperfect world mean they're not even totally safe brand new from the factory.

To accurately judge this we'd need a statistical analysis that I don't think exists. So yeah, in general a government shouldn't make laws without proof they'll be successful, but this is fire safety in city of mid & high-rises. The risk calculation is tough to criticize.