I think the notion of “freedom” was why the USA was felt to be a great country by those who lived here.
And why others risked often their and their families’ lives to come here.
Many in certain other countries today are not free. Especially women.
When I was growing up, people said the difference between certain countries and the US was that the US had a line waiting to get in and others had a line waiting to get out. To a degree that still seems to be true.
Today there is a lot of criticism of the US, even by its own inhabitants, but life might be quite different living elsewhere in ways they don’t anticipate. Maybe they’ll prefer it, and if so, good for them.
Yesterday I was talking to a lady from England who went back to visit recently. I was surprised, she was talking about some of the changes she’d seen there recently which she saw as negatives. This will always be the case - some like it, some don’t. Whatever. People should live wherever they like.