300 IQ in a vacuum gets you nothing. You need some type of status/power/influence in the world to have impact.
I think the previous "world record" holder for IQ is actually just a pretty normal guy: https://en.wikipedia.org/wiki/Christopher_Langan.
Just because AI is/can be super intelligent ("300 IQ"), doesn't mean it can impact or change the world.
Most startups are made of "high IQ" intelligent people trying very hard to sell basic $20/month SaaS subscriptions, and yet they can't even achieve that and most fail.
My biggest counter argument to AI safety risk is that, it's not the AI that will be the issue. It will be the applied use of AI by humans. Do I think GPT6 will be mostly harmlesss? Yeah. Do I think GPT6 embodied as a robo cop would be mostly harmless? No.
Instead of making these silly arguments, we should be policing the humans that try to weaponize AI, and not stagnate the development of it.