My understanding of the first part of your argument: The rapid (in evolutionary timescales) increase in human capabilities (that led to condoms and ice cream) is mostly explained by human cultural accumulation (i.e. humans developed better techniques for passing on information to the next generation).
My model is different. In my model, there are two things that were needed for the rapid increase in human capabilities. The first was the capacity to invent/​create useful knowledge, and the second was the capacity to pass it on. To me it looks like the human rapid capability gains depended heavily on both.
My understanding of the first part of your argument: The rapid (in evolutionary timescales) increase in human capabilities (that led to condoms and ice cream) is mostly explained by human cultural accumulation (i.e. humans developed better techniques for passing on information to the next generation).
My model is different. In my model, there are two things that were needed for the rapid increase in human capabilities. The first was the capacity to invent/​create useful knowledge, and the second was the capacity to pass it on.
To me it looks like the human rapid capability gains depended heavily on both.