tech workers face the real risk of being replaced
Having spent much of my career working alongside H1-B holders, an employer would have to be delusional to think that the quality of education of the average H1-B holder is comparable to that of someone from a good US or European university. There's not even much assurance that the H1-B holder actually took the exams for the degree they purport to hold. And many of the universities are little better than trade schools.
Also, disempowered workers temporarily enslaved to their employers are never going to innovate like free people. They're forced to be yes-(wo)men in order to survive and pay off the corrupt middlemen who got them their jobs. Megalomaniac CEOs might be OK with that, but that's not how you get the Next Big Thing. That's how you milk the idea your founders had two decades ago.