As an H-1B holder, we are legally entitled (and required) to work for one specific employer and that's it. You cannot even think of starting a company, you cannot work a gig job, you can't work two "high-paying" tech jobs.
Everyone knows the "ton of money" doesn't come from working a salaried job, it's from creating something new / starting a company.
But only US green card holders or US citizens can even dream of considering that as an option they can pursue.