Are you referring to only the first flight of the day? A plane lands, taxis to the gate. Passengers disembark, the plane gets cleaned and refueled, people on

Are you referring to only the first flight of the day? A plane lands, taxis to the gate. Passengers disembark, the plane gets cleaned and refueled, people on the ground checked it out, new passengers board (me), and it taxis from the gate. At no point did the pilots leave the airplane to "walk-around".