I called it an "observation" so you're right to question it. I cannot know it without looking directly at the code. I did not have anyone check the code - i cannot do that - i don't know anyone on the team.
All i have on this is my data that i collect the long, slow way by playing the game and altering one variable at a time. Even then, to do this kind of thing right, it takes hundreds (if not thousands) of trials to get truly reliable conclusions. That's why i led in with "I am still early in collecting new data but..."
UPDATE to yesterday's data, same area
106 encounters, 30 lockers found, 20 opened, 2 blueprints, 3 bear traps, 1 landmines, 3 cars, 0 FCC.
Hunter: Luck 10, NO Treasure perk
Opener of lockers: Luck 10, Agility 9, Perception 9, Skill 300, uses picks, with Treasure perk.