Unless Pedal Me provide open-source data on which they based this decision, I don't believe it is based on safety.

It's seems like marketing and cost-cutting issue for them.

Customer: "Driver is wearing a helmet, and nobody provided helmets for us.. Are we in danger?"

Pedal Me: "Say no more.. "

Plus it seems they only bought caps & jackets for their drivers previously, no safety gear. Drivers are replaceable, aren't they? (\s)

And other thing, why is a 3 meters long bike road-legal?