you miss the point. When people melt down, they reveal their inner issues. I.E. "in vino veritas".
Your point is easier to follow without trying to tie it to some not as relatable point, IMHO. "in vino veritas" ("in wine, truth") is not the same as your variations:
"under any influence, truth"
or "an outburst of severe emotional distress (meltdown), truth"...
Although there are counterexamples as well like in "What Are Little Girls Made Of" where Kirk-2 is influenced by Kirk-1 during the cloning. That doesn't make Kirk-2's racism Kirk-1's truth. Or the mind manipulations in "Day of the Dove" resulting in meltdowns (outbursts of severe emotional distress) from lies generated by the creature onboard the ship.
It would be better to say that Kirk was a complicated man...
