Do you know how many people use 4 digit passcodes, or no passcodes at all?
Do you know how many people share that passcode with others, intentionally or unintentionally? Family members, spouses, etc. repair people who do screen replacements. Their buddy, who can text for them while they drive.
I’m sitting on a plane and saw the person next to me enter her passcode. It’s 258085.
That is not a secure 6 digit passcode, it’s a vertical Tetris shape. Humans are great at pattern recognition, particularly when it’s in a grid format and leaves finger smudges.
I could easily pick pocket this woman’s phone and ruin her weekend without much effort at all, just from reading this article.
But you say her 6 digit passcode is quite secure?