Comfort and Convenience
Seating position is personal: height, arm length and long-held habit all shape how close someone wants to sit and how upright. Two drivers sharing one car rarely settle on the same compromise, so each readjusts.
Safety and Driver Assistance
A few minutes spent stationary, locating lights, wipers, demist and hazard switches, means those functions are already known before they are wanted. Preparation of that kind is far easier at the kerb than mid-journey.
Multimedia and Connectivity
Errand driving often involves a phone that is already low on charge by mid-afternoon. Where charging is available on board, it is worth treating as a separate question from how calls or music are handled.