It appears that your position is that cyclists are
always safer
in the middle of the lane. A very slow cyclist is perceptually nearly-indistinguishable from a non-moving object (eg, a "picnicker" or a "grandfather clock"). Therefore, if a cyclist is always safe, a non-moving object is always safe. That (to me) is an absurdity (a
reductio ad absurdum argument
http://en.wikipedia.org/wiki/Reductio_ad_absurdum reducio absurdim argument).