These stats you've got from the NHS website are useless without % chance an unpasterised dairy product has the Listeria bacteria in sufficient quantities? You use 1%, but why?
http://www.food.gov.uk/science/microbiology/listeria/#.U7v-tcmwERA
Upper limit of lab confirmed cases of Listeriosis is 234 per year in UK. That equates to 100*(234/6323000) = 0.0037% of getting Listeriosis. If all the people in the UK were pregnant then the % chance would be 0.074%.
Also people have died from listeriosis in melons too, so do we ban those?
I used 1% because as I specifically stated, it was an example. Your numbers are ludicrous as well, in 99.99999999999999999% of food poisoning people don't do lab tests to confirm what it was. I've had the flu, I don't know, 3-4 times in my life, I lived through it, I didn't go to a hospital, they didn't check which strain of the flu I had therefore lab confirmed numbers for flu aren't indicative of actual real number of cases of it in the wild.
Again the other point is, bacteria/flu doesn't always get you, your immune system may simply deal with it, in fact this is what happens. Not everyone in contact with a flu virus gets ill, same goes for other bacteria. Number of people who come into contact with in this case listeria will be significantly higher than those who get sick with it, which again will be massively higher again than the number of people who are actually tested for it.
If anything, the people who got so sick from listeriosis and actually got tested is likely to contain a very high incidence of pregnant women. Average dude gets ill, even if they go to the hospital it doesn't really matter which bacteria they have in most cases. If it's a pregnant woman in a bad way they are far more likely to confirm what it was.
So ignoring the 0.0037% because it's completely useless, I presume based on fairly wide spread advice, that the chances of getting listeriosis from blue cheese is significantly higher to start with than from getting it from melons.
Either way, you asked why blue cheese, the answer is, it's a potential source of listeriosis which if contracted has an incredibly high chance of killing a baby. Why you're arguing beyond that I don't know.
I didn't say anywhere to never eat food again of any kind in case it gets you, but if something has a higher chance than most other things, and it's particularly bad for babies... then limiting your chances isn't a bad idea. If you don't want to limit your chance, go for it. People run across roads in front of cars without looking every day, the vast majority don't die, that doesn't mean I'm going to do it because the chances are low that I will die. It's EASY to avoid doing it, and reduces the risk of me dying from running in front of traffic to zero. I might die when from a meteor landing on me, doesn't make it okay to run in front of traffic though which is basically your argument.
But Y might kill you anyway, so you may as well do X.... no thanks.