A bridge too far

if they did go ahead and build it what would be the point,as one of the other OPs said they close the severn crossing for the wind we get,that’s around 2 miles across if i’m right,if [and it’s a big if]they built this bridge you have around 22 miles [if from dover area]the wind’s would be twice that or more of the severn,with the current climate wind seems to be every month or so.