H1B is currently randomized lottery, benefiting sweatshops cluttering the pipeline, Current administration is not eliminating it but at least from their talk its about restoring their original intent, to bring in extra-ordinary talent. Which might actually be good news for SV, depending on how it is implemented?
Google, Microsoft, Netflix & Facebook benefit directly from H1B visas and are most certainly not "sweatshops". Even when you consider companies that pay less than the top tech companies, no one would consider them sweatshops. So hyperbole aside, and keeping in mind that H1B also brings academic talent to universities, the hate towards the H1B program seems more rooted in a hate of immigration than a worry of the program not realizing its "original intent".
If you don't want 85,000 of the best talent in the world per year to power US companies' and academia's growth, that's fine. Go ahead and limit the visa program and risk that talent going elsewhere.
If you know where to find these H1B "sweatshops" on US soil, please take those charts and company names to the Department of Labor and report the wage crime or occupational hazards you are implying with your hyperbole. Otherwise, your statements are deeply exaggerated. Here's a link to get you started: https://www.dol.gov/whd/howtofilecomplaint.htm