He is half right. However, I notice that Rayner is contradicting himself.
He wants more infrastructure for cyclists (this is something I want to see too, principally because it does make conditions safer for cyclists, especially those who are new to cycling, and also because, in urban areas, it should, properly conceived, actually take physical space away from motor vehicles).
But at the same time, he is banging on about the problem being "accountability". Well, if cyclists are away from the road, surely there is no need for accountability?
Frankly, it looks like he is just throwing a load of arguments up in the air and seeing which ones will fly.