Why should we listen to what John Galt has to say? He was wrong. This is not something that one can simply turn their backs on. Oppressive and intrusive government is not some benign thing that will quietly go away when starved. It is a ravenous monster that will destroy even more, as it thrashes about, desperately searching for food.
Mosters can not be ignored; they must be destroyed.
In the book, they had somewhere to go. We do not, so you are correct in that we cannot ignore this.