How is it scientifically possible that a literal gypsy/ self identified Untermensch has made it to 6'9" and 190iq?

How could this be possible?

This culture is anti iq/intellectual and has no selection pressure on iq for female/males

They're the poorest of the poor and choose not to live on welfare despite being in abject poverty.

Their culture surrounds committing petty crime/street fighting/having sex with family members/ living on land in trailers you don't own

How are they still reliably producing ultra uber humans?
Just the height alone is shocking... the normal irishman is 6 inches shorter than even the poorest Englishman....