I don't think shoving someone is going to end up in court unless it's a super unfortunate situation where you shove someone and they trip and fall and hit their head and die or something.

The article doesn't go into detail what specifically defendants alleged when invoking the law, but it does say it's similar to a temporary insanity plea. So "I was so enraged by the fact that a gay came on to me that I killed them". Which is a little extreme. Imagine every woman that's ever been hit on by a man they didn't like just attacking with the intent to kill. Just unreasonable all around to allow that as a defense

Sorry if I came off as patronizing. You're right, that's definitely a problem and it's a shame life saving treatments can't get made because they're less profitable than gaming our broken system

The point is that a TB vaccine wouldn't be administered much in the US, but mostly to people in extreme poverty in South Africa and Eastern Europe. The article says that the organizations most likely to buy the vaccine would be local governments and non-profits, which can afford to pay a much lower price than insurance companies in the US. That's why a TB vaccine is a lower priority than shingles, because the market for a TB vaccine would be people living in extreme poverty in developing countries, while shingles is mostly a concern for affluent people with insurance in the US, even though a TB vaccine would save many more lives.