Of course, you cannot decide how many meals you are going to prepare. You are not the boss. You do not control the heavy snowstorm that keeps people away from the restaurant, nor do you control the schedules of the sports teams that may bring people into the restaurant. You cannot create a rule that if the customer already ate today he can't get a meal now. If you stood at the door of the restaurant to chase customers away, you would be fired.
Judges have no such restraints.
To consider the pleas of prisoners for justice would only take up valuable minutes of a judge's busy day. What courts used to do The US Supreme Court used to think that violation of constitutional rights in a criminal prosecution deserves a remedy, no matter how much time has gone by. In Pennsylvania ex. Uveges did not challenge his conviction for 7 years. And in a later case we held that a prisoner could challenge the validity of his conviction 18 years after he had been convicted.