That’s true. You don’t need direction if you are only interested in speed
See image below for detailed explanation
The distance it traveled and the time that it took to travel that distance
Without a bulb energy cant go through and it would be an open circuit blocking the energy from coming out.
Velocity adds direction to speed; it is the rate of travel in a particular direction. To calculate velocity, divide distance traveled by the time it took to travel that distance and add direction. If one's position does not change, velocity is zero.