Most people are complete dumbasses at 25. (I include myself at 25 in that assessment) So if this is peak intellectual capabilities something does not add up.
To me that graph seems to say that the pure "subconscious" stuff or "ML similar" stuff peaks earlier, but comprehension peaks much later. So you perfect your tools in the brain at around 25, but then it takes another 20 years to really know how to use them correclty.
