No, that's not what I suggested. The car has to lock itself after the last door is shut with no fob in range. Perhaps after a programmable delay, but I'm not sure what would that be for beyond 15 seconds or so.
By "no fob in range" I mean not within the ignition range. The car, as it is, is quite capable to know whether the fob is inside the car or outside. So, no fob inside the car- lock it down when operator shuts the last door, if auto-lock is activated. Usual beep provided.
You can wash and clean your car with the fob in the tray. Or by de-activating the feature. Or leaving one of the doors crack-open. Child seat- same deal, you'd have enough time to open rear door after you shut yours. If you can't make it in time allotted by the delay, unlock the car in the usual manner, door button or fob.
If it annoys you, turn it off.
But to require the fob to be within the narrow "outside" range to activate the lock is preposterous this day and age...