E.g. someone who grew up playing piano might be able to play at an incredibly advanced level, while also being terrible at reading or writing sheet music.
The science around skills acquired during childhood/adolescence vs. learned skills is interesting. For example, I would not be surprised if non-native speakers, on average, have a better handle of the difference between effect/affect, there/their, etc.
That’s from training system rather than age.
You’ll rarely catch me mixing up there and their because I’ve learned those words reading them, and in written form they’re very distinguishable.
I couldn’t write a poem to save my life though, because I can’t tell which words in English rhyme - the written form of an English word isn’t trustable.
An interesting example is natives with different accents making different mistakes - Latino Spanish speakers for example commonly confuse c and s while writing, as it’s a similar sound.
Spain's dialect however pronounces those letters very distinctly (their famous “lisp”) so to Spaniards it’s obvious which one to use.
Shoot the messenger if you want, but the evidence is literally ubiquitous.
