They are talking about banning fat “bikes” not fat tire bikes. They are basically electric motorcycles disguised as an e-bike.

Like this one:

There is already regulation and they should be speed limited. But these bikes are designed to unlock the limit very easily.

Yep like how North Face replaced photos of many pages with photos that had people wearing their products in it. And this is probably just the tip of the iceberg, there must be plenty of stuff that hasn’t been caught yet.