a sailboat is there and under sail
so it must be windy, the wind will control your boat more then a paddle or in many cases a small electric motor, so as in drifting you are using the wind as your main source of power, the paddle or electric is to steer just like the sail boat uses a rudder, so they have no more right of way then you and because in most cases they have more momentum they have better control of their vessel then you do and are more able to change course
also with the electric you are using it to stay in one location so to the sail boat you show appear to be anchored, so the should change course well before it becomes a problem