D Walford writes:

They have already knobbled cycle use with mandated helmets (which some
think good) but bicycle use dropped when it was introduced,

If that's true it just shows how dumb most cyclists are.

There is no consensus on whether helmets themselves are effective,
useful, or worth either promotion or compulsion.

https://en.wikipedia.org/wiki/Bicycle_helmet_laws
https://en.wikipedia.org/wiki/Bicycl...k_compensation

Bikeshedding this is unlikely to be productive.