There is no reason why I should not walk a mile to church (and sometimes I do), but I don't want to in the pouring rain etc, or if I am taking something with me. Also, I do not necessarily want to walk home in the dark - ringing practice ends at 9 p.m., so from September to March that is a walk home in the dark. So two reasons why I might not want to walk to church.
I cannot - do not have time - walk to other churches where I might ring bells. Issues: the nearest church is a long walk on a main road, and in winter I would have to walk back in the dark. Other churches are in villages, where I cannot walk to and there is no bus. I don't cycle anymore, I am 74 and doubt I would be safe and a fall from a bike could cause me permanent disablement i.e. I could break a hip or leg. Certainly, I could not cycle out to the nearest village (4 miles) in the dark on a bike - it's dangerous.
The congestion, on what is a commercial road (car dealerships, restaurants, shops, take-aways, factories) is caused by a permanent bus lane on one side and now two (intermittent) cycle tracks, which between them have narrowed an arterial road out of the city, that regularly has car trucks parked on it, very narrow. Most of the traffic is commuters coming in and going out of a city, where they work. The buses are not necessarily convenient for that - and many people will not just be going to work, they will be going shopping, visiting DM etc, as well - impossible by bus unless you want to spend several hours on it. The current situation is not an improvement for anyone - and is going to cause accidents.
I find the righteousness of those who think we should all give up our cars and walk, cycle, and bus everywhere painful. It also suggests that they don't get out much or they live in London (bus every five minutes to everywhere + tube) or somewhere like Sheffield, with a tram system. When in Blackpool (own hotel there) I use the tram whenever I can because I like it and I don't much like driving. Otherwise, the car is my first choice. I am about to go out and learn the waltz. I am going by car. It would be two buses and a 40 minute journey, otherwise and had I to do that I could not go.