It’s always sort of weird to state something like this, because clearly any tiny change to the parameters of the universe would have had an enormous cumulative

It’s always sort of weird to state something like this, because clearly any tiny change to the parameters of the universe would have had an enormous cumulative effect over billions of years, dramatically changing the conditions that led to human evolution. One tiny pebble hitting our atmosphere, or not, three billion years ago, would be a hell of a butterfly wing. On the other hand, can we confidently say that the presence of iodine and bromine is necessary for the emergence of intelligent life? Can we even say that it makes intelligent life more likely, rather than less? Evolution tends to make use of the resources that are available, but that doesn’t mean it wouldn’t stumble upon alternative solutions if they weren’t.