Here's a look at what people trying to "legally" immigrate have to face.
My family did it. I expect no less of anyone else who wants to come to the US. If you can't hack the process, stay home. One of my daughter's classmate's family came in with no citizen 'anchors'. Somehow they managed too. And being skilled is hardly a panacea. Just try to follow your profession here in the states, with all of the barriers the various professional groups put up.