I just wanted to point out that Oral B’s basic electric toothbrushes still range from $45-$80, so it’s not quite as cheap as you say it is. Your point still stands in its entirety. The only thing that makes this product different from the $45 model is the Alexa functionality, and taking that away makes it effectively not the same product.
For the 2nd one, better safe than sorry. You would feel like more of a dumbass if you heard a story in the news about a gas leak fire, or some other form of damage/injury/death.