It's such a scam to pretend that H1B workers are, on average, high performers in key positions. That isn't the reality, has not ever been the reality, and will not ever be the reality. H1B is about cost of labor, has always been about cost of labor, and will always be about cost of labor.

disclosure: have worked for large h1b heavy shops my entire career, and while there has been the very occasional exception, the bulk of the h1bs are hired entirely for cost reasons.