I'm not too well versed in how the court system works.
I have this question that I feel is stupid so I tried to research information but got a dead end.
Question: How or even why can a court decide not to hear a case? WTF? The way I see it, they are there to interpret laws that are in dispute or an infringement on people and the constitution.
They seem like ostriches that bury their heads in the sand when they don't want to deal with issues.
Can someone enlighten me as to why these seemingly aloof and smug elitists can opt to not hear a case?
And sorry if I stupid. No can help. I went publik skool and neva have 3.7
But I smart enough to know joe biden is lose money. 
This is mostly my understanding/opinion, so take it with a grain of salt...
Lower courts determine the facts of a case and render a verdict. The appeals courts consider cases based on things like prosecutorial misconduct, bench rulings that were incorrect (bad interpretation of law), undeclared biases on the part of the judge, jurists or prosecutor, or technicalities such as whether the charges exceeded the statute of limitations, or if a piece of evidence was wrongly allowed or excluded.
After considering what is being appealed, the upper courts then have to decide if revisiting the case in an appeals trial has the possibility of affecting the original outcome. Example: If one juror was found to be prejudiced based on things he said after the verdict, does that mean the alternate juror would have voted differently -- especially when considering the other 11 jurors voted the same way? Unlikely. No sense in wasting the court's time and resources, the prosecutor's time and resources, and all that tax payer money to hear an appeal that would accomplish nothing. Unless there's testimony that the one bad juror convinced the other 11 to vote with him against their better judgement, there's no chance of getting a new trial in this example.
The Supreme Court is similar. They pick cases based on the probable impact their decision may have on lower court rulings or upon the existing laws at both state and federal level.
The Supreme Court agrees to hear about 80 cases per year out of about 7,000-8,000 petitions. If they decline to hear a case, you will never know why. The Court never publishes statements on cases they do not choose to hear.
Here's part of an article on how they choose the cases to hear, and why they can't hear all of them:
One reason is time. The court operates only nine months out of the year and has other
business to attend to beyond reviewing and hearing new cases.
Another reason is merit. Not every petition is appropriate for the Supreme Court to accept.
The U.S. Constitution specifies certain kinds of cases the Supreme Court has the power
to consider and rule on, including cases that relate to treaties, diplomats and disputes
between states.
In most situations, though, petitioners want the court’s nine justices to reconsider a case
that has already been decided in a lower court. The federal government currently has
94 district courts and 13 circuit courts, as well as Bankruptcy Court and the Court of
International Trade. In addition, every state has a network of courts. The petitioners
hope the Supreme Court justices will then invite counsel from both sides to Washington,
D.C., to make their arguments so the court can settle the issue once and for all.
The cases that do appear before the high court typically have some unique features.
The lower courts may have disagreed on an issue. In situations in which one court has
ruled one way and another court has ruled another, the Supreme Court justices may
choose to intervene and clarify the law.
The court also hears cases that answer important constitutional questions, like the
extent of state powers. It also looks for cases that will affect the whole nation, such
as ones dealing with an individual’s right to expression and the freedom of the press
to operate.
https://www.livingfacts.org/articles/2020/how-the-supreme-court-decides-which-cases-to-hear