Positive correlation between IQ and happiness

No.11703328 ViewReplyOriginalReport
https://pubmed.ncbi.nlm.nih.gov/22998852/

Why does everyone believe smart people are sadder when studies show the opposite? Best I could find was that people with very high IQs were moderately less satisfied with life:

https://www.tandfonline.com/doi/abs/10.1080/15427609.2014.936182#.VR1XHRCtaFE