That seems debatable, and in my cynical mind probably influenced by manafacturers.

I got so bored of throwing out ones when the battery had gone. My dentist didn’t have any complaints last time I went, but guess we’ll see in a few years if it was the right decision!

Wouldn’t recommend. I had one, it gave up after a few months. They replaced it, and that did the same.

This is a sustainable toothbrush https://smol.com/uk/stories/smol-bamboo-toothbrushes

Does a smoking Father cause neurodivergence in offspring, or does an undiagnosed Father become fixated on smoking?..

Creates endless pain.

Or will they feel vindicated by their parents support against your “evil”

Then that’s a parental problem, not a problem caused by the action.