It doesn’t matter.
He’s not in the US because of H1-Bs.
He’s in the US because of our rule of law (don’t have to bribe officials to do any and every little thing), our infrastructure to include transport and electricity, our Universities, our purchasing power our lack of intellectual property theft, and our capital markets.
He’s just so greedy he wants to add wholescale wage arbitrage.
As though the richest man in human history can’t afford regular market wages, and ad though he couldn’t afford to pay to train US software developers, as I remember ordinary companies without Musk’s wealth, doing in my lifetime.