No I don’t agree that heritability of IQ is well established.
First of all I do not believe that IQ is a good metric for intelligence, nor that intelligence is a useful scientific construct.
Secondly, there are whole subthreads here that go into the nuances of what heritability means for measured IQ. From what I’ve gathered is that findings which assign 50-80% of the variance to inheritance neglect to account for covariance, or use very biased assumptions about G×E correlations or G×E interactions which skewes the results in favor of genetic explanations, i.e. they are biased.
First of all I do not believe that IQ is a good metric for intelligence, nor that intelligence is a useful scientific construct.
Secondly, there are whole subthreads here that go into the nuances of what heritability means for measured IQ. From what I’ve gathered is that findings which assign 50-80% of the variance to inheritance neglect to account for covariance, or use very biased assumptions about G×E correlations or G×E interactions which skewes the results in favor of genetic explanations, i.e. they are biased.