[inawarminister]

Yes but let's say, pre-writing people needed to remember 100% of all information they needed to use - which writing people can offload to tablets and parchments.

Pre-agriculture people had it worse, they needed to remember 100% of all pertinent informations by the hunting band, which had a max amount of 50-100 people. All the predictive abilities for preys in their lands, natural disasters, medicines, rituals, etc.

It's logical that adoption of technology and farming led to lesser pressure for memory recall, at least for the median human.