I don't think it's impossible to come up with arguments against them. For one thing, extrapolating the current gradual rate of progress forwards means that we will get to see several minor "intelligence spills" before the hypothetical big and last one, and by observing what went wrong, humanity will have the opportunity to come up with solutions.
Since very smart human beings have in history done a lot of damage, but never ended the species or anything, we can conclude that the world has an "intelligence safety margin" that extends up to Alexander the Great or Napoleon. There have been some incredibly smart people in human history and none of them have ruined everything, a few countries at most.
Since very smart human beings have in history done a lot of damage, but never ended the species or anything, we can conclude that the world has an "intelligence safety margin" that extends up to Alexander the Great or Napoleon. There have been some incredibly smart people in human history and none of them have ruined everything, a few countries at most.