I think those endorsing and explaining many children learn to read, count etc at young ages, need to take into account that the majority of this comes from home, in (normally) relaxed surroundings, geared around whether that young child wants to learn.
Our children started to read at home as all of them, without exception, were read to from the day they were born.
Counting and number recognition came from games we played with them.
Learning is fine, formal education with testing (which is used in infant schools onwards, not to test children’s understanding, but more as a stick with which to beat teachers), is something entirely different.
Even when our nursery and childcare settings are inspected by Ofsted, where in my opinion, the onus should be on safety, healthy eating and safeguarding, academic learning is looked at.
It’s all madness and is one of the reasons teachers leave in their droves!