People in the UK are convinced that changing lanes is horrendously dangerous and want to do it as little as possible or when they have as much control over it as possible, so they will get into the correct lane ASAP rather than wait in case it is more dangerous later. That seems to be my observation from many years of lane threads on various forums and particularly speaking to older relatives. I don't know if it's because motorway driving wasn't allowed at all by learners until recently. When I had driving lessons in Germany I was on the Autobahn on about lesson 3, as soon as I had basic control over the car my instructor wanted me on there. I was terrified but it was actually fine! I quite quickly got used to it and didn't find it any worse than driving on any other kind of road.
It's true you need to be aware of where other cars are around you when changing lanes but you should be aware of that anyway. TBH I now find it very strange how much British drivers (on average) worry about this.
But I also think the German signs for zipper merging are great: