I came in on an H1B as an IC3 at Meta. Now, with the skills I gained during my career, I maintain core infrastructure that has a massive benefit to the industry and is critical to tech companies of all sizes (I learned last week that a major auto manufacturer uses my infrastructure as well). Immigration's benefit to society is tail-distributed, which is why it's important to have broad-based immigration (you can't predict who will be at the tails).