So ‘mass cycling’ simply means that everyone has the option to cycle, for any given trip, in much the same way that walking, driving and public transport are already available. It is about having transport choice; a better range of transport options to pick from.
I think this is often lost in debates about cycling, particularly in the way we refer to ‘cyclists’ and ‘motorists’ almost as distinct categories, and present binary oppositions like ‘bikes vs cars’. This is something that both cycling campaigners do, and opponents of designing for cycling, who are all too happy to point that people can’t cycle for every single trip, or that cycling isn’t a universal solution. It is deeply unhelpful – it creates the impression that to be ‘a cyclist’ you must cease to be ‘a motorist’, and vice versa.
Building cycling infrastructure isn’t about forcing everyone to be ‘a cyclist’, but about creating another transport option for people to get around, alongside walking, driving and public transport. Doing so reduces pressure on the road network for people who are driving; the same people who might be cycling for a different trip.