All of the ones I have looked through have that. Every single one.
We're looking at just one metric though. Freedom to express ideas on the internet. Countries where you can get arrested for "offensive" tweets or get your house raided for calling a politician a dick score a few 0.1s away from the maximum of 10. We don't know how, because AFAIK, they do not go into specifics about why they give the UK/Germany a 9.x/10 on "Internet Freedom."
>I would assume this means the experts have concluded that the right to be rude to a politician on Twitter is not a particularly important right
Then I, along with most people, would conclude that their metric (and possibly by extension, their entire index) is useless. Not having your house raided for calling a politician a dick is exactly what most people would consider a particularly important "right."
Perhaps the experts have concluded that the right to be rude to a politician on Twitter is not a particularly important right and its removal doesn't have much impact on the overall freedom of that society. That seems more likely than a diverse group of think tanks, academic institutions, journalistic outlets, and NGOs have all either joined a conspiracy or randomly acted in concert to misrepresent the relative freedom of the US in comparison to our peers.