You seem frame it like some kind of EU conspiracy to destroy UK, but what would be the alternative? Have every truck driver have the license for every country they go through or deliver to?

Can you imagine how much of a pain it would be for a truck driver to keep up 10+ licenses and for the logistics people to plan things when only some drivers can go to only some countries?

Also, if the required knowledge is the same, why is getting UK license so much more of a hassle than in other countries?