Logically, as the population (and so road users) increases, so will the number of idiots on the road. Fortunately, there has also been an increase in the road miles built, which should help to keep a steady ratio of ‘idiots per mile’.
While concentrations will inevitably occur, the tendency of idiots to remove themselves from the breeding stock when in concentrations likely makes such concentrations temporary.
For myself, I will not be eschewing the roads, the ‘hack’ will get me in and out of town, and the ‘tourer’ will see me out and about. I have cycled in London, the South, North, East and West, and despite some interesting interpretations of the Highway Code, have only been hit by a vehicle twice in over 50 years of cycling (both times by female drivers). I have had more occasions to raise a hand in thanks than a finger in reprobation.
YMMV, Terms and Conditions apply, don’t try this at home.