Not sure if translation error or just mamgaka not knowing their shit, disc tumbler locks arent easy to lock fot somrone with "some" lockpicking knowledge. Pin tumblers are generally the easy ones, disc tumblers afaik require more specialized tools.
Here's a quick way to picklock a shitty pin tumbler lock: all you need is a waverake, a wavy bobbypin can work, and some other bent and flat piece of metal to twist the core from the otherside, then you apply some pressure and just rake that shit and boom you got it open. You dont need much skill for this, first time i did it i had improvised a pick from a keyring.
Was bored, it did take a while first time since i have never done it before but after that i could open the cheap chinese lock in couple seconds with it.