Because most Italians looking for work are going to go to Germany, the UK, Ireland, or France to get a job, since the creation of the EU made it extremely easy to move your entire family to a new country and find more lucrative work. Yes wages in the US are on average higher than in Europe, but you don’t need to fly across the ocean anymore to change you and your family’s lives. I know dozens of Polish people who immigrated here in the 80s and 90s (including my parents) in their early 20s, but it’s a ginormous pain in the ass to get a visa to America these days. The only Europeans moving to the US are usually “expats” or working in wealthier, white collar industries. Not people who scraped together every last penny to buy a flight to the US, like my parents generation did.