The program has defacto evolved to one in which the US can tap into a skilled global labor market to increase competition for roles, without paying too much attention to the actual legal requirements.
Sources:
(Like many here, I've written a few H1-B role requisition documents - which are often designed to be so ludicrously specific that it would be almost impossible to find anyone to fill that role, save for the one person applying for the visa)
[0] https://www.dol.gov/agencies/whd/immigration/h1b
[1] https://www.boundless.com/immigration-resources/the-h-1b-vis...