Personally, as someone who left the UK in the 90's for silicon valley, I'm blown away that the UK government has even heard of the internet, let alone built a decent digital service.
I'm glad you're happy to publish all the details of your interactions with government services to an advertising company in another country with far less in the way of data protection law.
I'm not.
Or are you saying instead that you should impose your own personal choice on everyone else?
Just because I know how to block analytics doesn't mean everyone else has a clue they even exist, nor that we should allow our government to export data about us in this way.
Amazon
Google (and any service under it)
eBay
?
None of them, however, is the UK government unnecessarily leaking details of my interactions across borders.