This is precisely why it was failed legislation. The federal gov't doesn't have the power to tell the states to set up exchanges or adopt Medicaid expansion. Being a constitutional lawyer Obama should have known that. Republicans in the form of Chief Justice John Roberts did Democrats a huge favor by not throwing out Obamacare. It was clearly unconstitutional. Instead he did an end around which made little legal sense. He started by changing the words of Obama himself and called it a tax but if it's a tax then it's unconstitutional because all tax legislation has to begin in the House, not the Senate. He did this because he didn't want to be the one to take this down. He wanted the voters and the legislatures to decide what to do with ACA. I strongly disagree but that's why the law still stands today.
As for funding risk corridors, if the law is that fragile then it's not a very good law. Truth is that it's not a good move politically for any politician to sign off on sending taxpayer money to health insurance companies that are already making tons of it. These politicians would get primaried out due to signing off on corporate welfare.
You obfuscate magnificently in an effort to maintain belief. If the ACA fails it will be because of Repub efforts to force failure. Their vision of how govt should work favors the financial elite entirely. I mean, it's not like billionaires really need health insurance, is it?