A lot of adults conflate giftedness with maturity and expect the kid to act like an adult, combined with the pressure to perform and an identity built around being gifted...it fucks with development.
There is a reason why depression and suicide in adults can be correlated with formerly gifted children.
Depending on the year and test, four in ten struggle with basic reading or basic math. That's not even the pressure of high expectations, but just the pathetic state of US culture around educational attainment, expected behaviors, etc.