There is huge confusion between the H-1b visas, which are for professional workers, such as engineers or doctors, and the H2b program, which is for seasonal or temporary, usually "unskilled" labor.

H-1B are for specialty fields and while paid somewhat less than US peers, they command professional level salaries: "The regulations define a specialty occupation as requiring theoretical and practical application of a body of highly specialized knowledge in a field of human endeavor,[5] including but not limited to biotechnology, chemistry, computing, architecture, engineering, statistics, physical sciences, journalism, medicine and health (doctors, dentists, nurses, physiotherapists, etc.), economics, education, research, law, accounting, business specialties, technical writing, theology, and the arts, and requiring the attainment of a bachelor's degree " These are not the low paid labor we see roofing houses or harvesting crops.

These professional workers are favored by US corporations because in addition to making about 10% less (software engineers in Silicon Valley make $90-180K) they must be employed to sustain their visa and so are expected to work longer hours and are not free simply to quit (unless they have another job lined up). They do, no doubt, tho it violates the program rules, take the place of US professionals, who are more expensive and less compliant.

The two programs are very different and by no means should the professional wages of H -1B employees be considered "low wage" tho they re 10% lower than US professionals, who earn high salaries. Even Trump confused the two when he came out for the H-1b program, claiming he had hired many of such, when he meant he had hired the much lower paid H-2b seasonal and temporary workers (as maids, gardeners, etc).

American corporations (and I would add consumers) benefit from the seasonal program with lower wages (and often no alternative worker pool to draw from, as in harvesting crops) and cheaper food, cheaper housing, etc. American tech companies benefit from foreign professional labor because of lower wages (tho by no means low...well above median incomes) and more control over the workers.

There is no way in help that US farmers and housing construction corporations will allow their source of cheap labor to be deported. There is no way in hell US tech companies will allow the program that gives them cheaper labor with more control to be cut back. This is all part of the narrative to feed the manufactured anger of mostly white US workers that has been manufactured to "redirect anger and aggression towards targets of hatred (Goebbels/Principle of Propaganda 18) rather than at the corporations hiring these immigrant labor and offshoring their jobs.