I agree. Closed road sportives have a lot more chance of promoting cycling than open road types. I have done a handful of Sportives and Audax rides, and the only time I have seen active roadside spectators or even people taking a mild interest is on the Velo Birmingham.
You might agree, but that's not what I meant.
I can't care less about people getting interested in watching races from the roadside, I want people to get off their cars and onto their bikes to go to work or for the school run. I want UK cities to be like Dutch cities.
I don't think that sportives or Audax events help much, open roads or closed. We need more events where the roads are closed for people to stroll around cities, maybe even stroll at a brisk 15 mph, discover how easy it is to go from Birmingham to Coventry, which they didn't think it was even possible.
What we don't need is a bunch of wanna be pro howling down the roads at 30 mph, that doesn't help anybody...