Well, I do not think that Germans, Swiss, Austrians, Norwegians, Finnish, Swedish, Dutch, Brittish, Japanese, South Korean etc dream of coming to the USA
Its mostly about the less developed countries, Mexico, Venezuela and similar.
Let us not be extreme - the USA is not something everybody wants in, but its not some worst and most racist country in the world.
In the standard of living, the USA are the 20th in the world:
https://www.usnews.com/news/best-countries/quality-of-life-rankings
Which is not bad, but far from the best. But because of English and wide spread Spanish, its very convenient for many people from poor countries to go to the USA instead of to, for example, Japan.
For the most black people its better to live in the USA than in Africa. And they know it, no exodus is happening. When somebody is talking a drama, but not leaving, I trust their actions, not their words.