I have to say you're making this up. One of the requirements of getting H1B is that your employer proves:
1) You academic degree is relevant to your current job
2) They are paying a "prevailing wage" meaning that your salary is above the average that they'd pay to an American employee. For every county and category in the US, there is a specific minimum salary for international students. For example, in my specific county in the state of IL, for a software developer with a PhD degree, the minimum annual salary MUST be equal or greater than 72K $.
If somebody works for the Uber/Lyft,
1) it is not related to the major
2) They'll making way less than the minimum salary
My lawyer said she had a client with with a ending asylum case. She applied for the extension of her H1B after 3 years and USCIS did not approve it because her new employer could not prove that the job was related to her academic major.