UnitedHealth CEO shot

Not in most places. Insurance companies lose all the time. It's why they almost always settle. No insurance company wants to go in front of a jury because they almost always lose.
It depends on the case, jurisdiction and parties involved. But I agree, of course most are settled out of court. I don't know about broader most cases insurance companies having an advantage, but the ones I was familiar with, the defendant won their cases more often than not. I'll grant that may not be the norm though.