I agree with you that administrations can do pretty much whatever they want, but I think you are missing the point:
1. if H1Bs are not to lead to green cards per your interpretation of existing laws, then no H1Bs should lead to green cards, regardless of country of origin
2. if H1Bs do lead to green cards as we know they do in practice, as per my 'dual intent' understanding, or as per your 'wink wink' description, then they should lead to green cards regardless of country of origin
But the inconsistency in providing green cards to Tunisian H1Bs in 18 months while providing green cards to Indian H1Bs in 100 years is where the problem arises, and that is why the young author with a bright future is headed to India instead of applying his intelligence and abilities in the US.