H-1B is the one of the few legal stepping stones to become a citizen (and get permanent residence) if you don't go through routes like marriage or family sponso

H-1B is the one of the few legal stepping stones to become a citizen (and get permanent residence) if you don't go through routes like marriage or family sponsorship or a silly lottery. So while yes, you cannot start a company on an H-1B, it is for many people a pre-requisite to become a green card holder (and thus being able to start one).