If a car is parked on a double yellow line and you hit it, should it be your fault?

The lines are there because it is a hassard to park there so if you park there and cause an accident, surely it is your fault.

My mate is a truck driver and recently clipped a car as he came around a corner, it was a tight corner and the car was parked on the double yellows meaning there wasn't enough room to swing the cab round the corner.

My mate was blamed for the accident, but surely it was the bloke who parked on the yellows who caused the accident.

Possibly me talking shite, but it seems abit unfair, if I jumped a red light and someone hit me coming the other way, i couldn't claim they should have seen me.

If liablity could be blamed on the parker, people could just drive into cars parked on double yellows and claim on there insurance, if this was the case, nobody would ever park on a double yellow again.