Make those little illegal people work so I can have cheap veggies!  That's your argument in its entirety.

Conflating them with H-1B visa types in Silicon Valley or at Microsoft or even our own Silicon Forest  is disingenuous.   

H-1B visa holders are Legal, not illegal.   

"The H-1B is a non-immigrant visa in the United States under the Immigration and Nationality Act, section 101(a)(15)(H). It allows U.S. employers to temporarily employ foreign workers in specialty occupations. If a foreign worker in H-1B status quits or is dismissed from the sponsoring employer, the worker must either apply for and be granted a change of status to another non-immigrant status, find another employer (subject to application for adjustment of status and/or change of visa), or leave the U.S."

"including but not limited to biotechnology, chemistry, architecture, engineering, mathematics, physical sciences, social sciences, medicine and health, education, law"  etc.