The vast majority of my exterior is brick, but the area in question is just vinyl siding so you're not entirely wrong. A few more layers to get through: the vinyl siding, foam backing on the vinyl, vapor barrier, old cellulose insulation, then interior wall.

Just further shows the futility of putting an expensive lock on a regular home door. If someone wants in, they'll get in. The lock is definitely more of a "please don't come in" than anything real.