I don’t think it makes sense to be confidently optimistic about this (the offense defense balance) given the current state of research. I looked into this topic some time ago with Sammy Martin. I think there is very little plan of anyone in the research community on how the blue team would actually stop the red team. Particularly worrying is that several domains look like the offense has the advantage (eg bioweapons, cybersec), and that defense would need to play by the rules, hugely hindering its ability to act. See also eg this post.
Since most people who actually thought about this seem to arrive at the conclusion that offense would win, I think being confident that defense would win seems off. What are your arguments?
I don’t think your first point is obvious. We’ve had super smart humans (e.g. with IQ >200) and they haven’t been able to take over the world. (Although they didn’t have many of the advantages an AI might have, such as mass copying themselves over the internet.)
In general, the power(intelligence) curve is a big crux for me that we can’t fill in with data points yet (of course intelligence is also spiky). Imo we also have no idea where takeover-level intelligence is, what takeover-shape intelligence is, and what maximum AI would be.
What do you mean by soft limit?