>>1149849>if nobody controls the interest rate
It's important to read every word. What was stated was that the Fed (in this case the Federal Reserve, not the Federal Government) does not control the rate you can lend at.
Federal and state governments have usury laws, but while the term "usury" is used, the laws are consumer protection laws, not religious mandates. You should be thinking of them in the same category as laws that say you can't sell an equity release contract to someone with alzheimer's. The fundamental purpose of the law isn't that your behaviour is immoral, but that the state is stepping in to stop you taking advantage of someone who doesn't have the knowledge or ability to look after their own interests.
As an illustration, in most states once you're a company borrowing millions of dollars, you can borrow at any rate you like because it's presumed you and the lender both know what you're doing.