We can debate whether conventional weapons are better than nuclear weapons or not. But none of that matters. We’re better off just agreeing to it and working to improve it…

The problem with your analogies are that there is no path where a constant improvement to cars leads to anything but better outcomes for human.

There is no realistic or likely path where improvements to cellphones leads to anything but better outcomes for humans.

However, if AI keeps getting better to the extent we can imagine, ie Super Intelligence, the outcomes are more likely to be extinction level negative than positive.