All very true. Guess I'm also lucky to have access to a lot of very quiet roads where I live. If you were to do a survey, I'm sure the map of Britain would show whole large areas that are a no-go for cyclists. Looking at the "Your Ride Today" thread, there also seem to be several pockets that produce the most contributors, suggesting that Gloucestershire, Leicestershire, Yorkshire and parts of Scotland (for example) may seem less threatening.
There are places in the Midlands where I would love to be able to ride, but I take one look at the road network and get put off by the dual carriageways, huge roundabouts and motorway link roads everywhere. Personally I would never have ridden to Stratford upon Avon without audaxing there using the Stratford Greenway. I ride a lot of audaxes, and I find that someone or other at Audax UK will have used local knowledge to find all the very best quiet routes around. The calendar of events on their website is well worth a look if you are looking for ideas.
The "Your Ride Today" thread has also been a source of inspiration to me over the years, helping me to discover the Mawddach Trail and the roads of South Wales and the Isle of Wight and inspiring me to try the Snake Pass when it was closed to traffic (etc, etc). If any of you know of any great quiet routes in your area, why not share your experiences on that thread?
I'm currently on holiday in Scotland, and we stopped off at Stirling on our way up. I was going to do a ride out to the Wallace Monument and then down through Stirling to Bannockburn and the hills beyond. This would have meant riding through Stirling twice. After driving through it once, I ditched the idea immediately. I think I now see why nobody has ever posted a ride through Stirling in "Your Ride Today"! Hoping for better luck near Moffatt on our way back home.