system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] If the Imperial conditioning of Suk doctors was really that good, how was Yueh broken with what essentially amounted to simple blackmail?

It boggles the mind that for thousands of years of inter-familial warfare in the galaxy, the myth of Suk conditioning was never broken with just one known incident of a doctor's family being kidnapped. I mean, even a non-Mentat like me could have thought of that...
gpt
Suk doctors are supposed to be impartial, like Mentats.  Yueh was broken by love, which allowed him to be blackmailed.  As someone else mentioned, the Bene Gesserit achieved this using an early version of the kind sexual imprinting the Honored Matres would later hone to perfection.