Why is it advised not to shut off the engine in the event of a jammed gas pedal?

• Shutting off the engine increases steering control.
• Shutting off the engine reduces the risk of a collision.
• Shutting off the engine may cause a loss of steering ability.
  Explanation:

  "Do not shut off the engine unless, pressing the clutch or shifting into neutral and taking the foot off the gas pedal, do not work to slow the vehicle. If you shut off your engine, you will lose the ability to steer the vehicle."
• Shutting off the engine has no impact on vehicle control.