That's a pretty trite way of looking at it. You could see for example how important free speech was to the US' civil rights movement in making sure that people were able to organize to challenge the status quo.
>.. if it was in US they could have been removed and have their free speech in a designated area simply because they don't want them there.
US' citizens generally have a better time in courts challenging such things than Europeans do, however.
>In contrast, in most of Europe you usually can approach and ask politicians whatever you like.
But can you tell them whatever you like without facing repercussion if they don't like what they're hearing? No.
In the US, you can still exercise your right to free speech to inform your fellow citizens about the genocide of Gaza - in Europe, most definitely not so easy. (Some European states, its easier than others ...)