Granted, Stubbs’ host nature was hidden from most, and that cottage’s location isn’t the most well-known, but it still possibly reflects on how lacking Delos’ follow-through was after everything went to hell.
If not to account for those known to be missing, then to at least make sure there weren’t any further human casualties to be discovered.
Case in point: After his unsuccessful attempt at suicide, Stubbs’ would-be corpse-bot apparently went undetected for weeks inside the lab basement of the Sector 17 cottage where the Ford Host family used to reside.
As head of the board, the non-human Charlotte Hale probably didn’t make it a priority, but it seems like someone would have, and should have, ordered teams to do full security checks of every inch of the park.