We live in a country where, in most states, one may be fired for good reasons, bad reasons, or no reason at all. The bargain the law is meant to strike is that employees may leave at any time so employers may let them go at any time too.
The exception of course is that one may not be fired for discriminatory reasons. But even then, not everything that one might think of as discrimination is recognized as such under the law. For instance, imagine that a person is discharged for being obese. That may sound like discrimination to some, on the basis of weight or appearance. But I know of no law that allows a discharged employee to sue on that basis.
That does not stop employees from trying to sue their employer for wrongful employment on bases that are not covered by discrimination laws. In such cases, the Trial Court will serve a function more akin to that often taken by the Courts of Appeals. This is because, if the alleged wrongfulness of the termination is indeed not illegal, it will be the duty of the Trial Court to dismiss the suit as a matter of law. The process in that instance is akin to an appellate process and appellate attorneys will be highly qualified to handle it. And if the Trial Judge drops the ball, which happens even to the best and despite the best intentions, the appellate courts will still be in a position to reverse any possible mistake.