What Vernan did not know was that for each of the situations, there was another explanation. Lex survived the Immortal level Kraven's coercion because of Regal Embrace. He was not intimidated by the massive, mountain sized Kalter Flug because Lex had seen stronger beings at his Inn, and also because the giant snowflake had not restricted Lex by using its coercion. When Lex encountered the student fighting the Red-eared whatever the hell that was, Lex's instincts directly told him that Lex would die if he interfered.
Likewise, for each point of interest, his evaluation was incorrect because no one would be able to understand Lex's reasoning for his actions. After all, only body cultivators had honed instincts, and that too at a higher level. But Lex did not display any of the key indicators of a body cultivator, whereas his spirit cultivation was prominent.