Opinion or fact? And if it is fact then please post the statistics to prove it.
Strong evidence and if you are not aware of the evidence by now then perhaps you should do a little research into it first. Pedestrians have a much higher serious injury and death rate per journey km than cyclists and pedestrians have a much greater likelihood of suffering a head injury in those accidents (48%) than cyclists (38%). On a lifetime basis you are about 15-20 time more likely to suffer a serious head injury from a motor accident, trip, fall or assault than you are from cycling.
Sources: RRCGB 2009 Article 6 Table 6f and Main Report Table 52; Pedal Cyclist Casualties in Road Accidents 2007, DfT Road Accidents Fact Sheet No 4, 2008; Pedestrian Casualties in Road Accidents 2007, DfT Road Accidents Fact Sheet No 3, 2008.