Yes, even if the driver looks into the mirrors before he opens the door, or the passengers open theirs, some speeding bicyclists can still appear, seemingly out of the blue…sometimes with tragic consequences 😔
Still, I have taught myself to open the car door from the inside with my right hand - or with the left when I’m sitting on the right hand side of the car.
Thus, I am turning backwards automatically to take a look🙂 for bicyclists or other vehicles.
The Dutch even teach this way of handling a vehicle door in their driving schools.
Good precaution.