Absolute rubbish.
IANAL, but I believe that the person that answered
this is.
A driver should always be doing so within the speed limits and taking into consideration the prevailing conditions. If the driver is unable to react to a stationary object in the road* then they are driving irresponsibly/too fast. In a manouevering situation, the driver should be observant enough to avoid any stationary object, 'illegally parked' or not.
*excepting e.g. something which has just fallen from a vehicle in front of the driver.