I guess you missed this part:
“• FACT: To apply for a green card at a date years into the future, Z visa workers must wait in line behind those who applied lawfully, pay an additional $4,000 fine, complete accelerated English requirements, leave the U.S. and file their application in their home country, and demonstrate merit based on the skills and attributes they will bring to the United States.”
They should do that BEFORE they get admitted to the country. Not AFTER.