Joanne, your posts are rather on the extreme side and simply do not reflect the reality of road cycling in my 20 years of experience.
Firstly, you are choosing the relatively few stories of accidents/ mishaps and trying to say that this paints an accurate picture of what it's like cycling on the road. It doesn't. I say these stories are "relatively few" because every day thousands and thousands of people cycle on UK roads without a whisper of a hair of a bump.
Secondly, I have cycled in Waltham Forest - on all of the roads featured in that blog. I did so for about 6 years, including throughout my first pregnancy. Waltham Forest is extremely unrepresentative of driving on British roads, so it's a bad example to use. The drivers there are spectacularly bad, compared to drivers just about anywhere else in the country. In any case, even when cycling there for 6 years, I was FINE. It's awful that the poor 'Indiana Jones' character in that blog was hit by a lorry, but did you notice that he said he was hit because he wasn't looking where he was going? And not for the first time - earlier on he hit several potholes (in 20 years I've never hit one - I've always spotted them in good time). Just prior to his accident he was distracted by a road sign, then swerved to avoid an obstruction (rather than slowing down to a stop) and that's when the accident happened. So the accident has absolutely nothing to do with road cycling being unsafe, and everything to do with unobservant road users being unsafe.
Studies show that there are lots of things cyclists can do to make their road journeys much, much safer (such as looking where they're going!). I have already detailed some of those measures in my first post, and my experience taught me that the more confident and assertive I became, the safer I was on the road. If you chose not to take those measures whilst road cycling, it's no wonder that you are so fearful of it.