Sure, all evidence is SUPPOSED to be available to the defense. Do you really think that prosecutors always do what they are supposed to do?
Public defenders are the lowest paid lawyers and they are often filled by people who are fresh out of law school and are just minding their time until they can get into something more lucrative.
Even if a public defender has the type of heroic personality who will look under every nook and cranny to ensure his client is defended fully, they just don’t have the funds to do so and they have a few dozen client files sitting on their desks at all times that need their attention.
Defense counsel for capital cases tends to be superior because the rates are higher. My Cousin Vinny, while amusing, is Hollywood's version of reality, which is to say that it is fantasy dressed up as reality.
You’re right this is not a perfect world. Do away with the Justice System until it is perfected.
Incidentally the Court Order in the case, with even LESS evidence, has no problem STATING UNEQUIVOCALLY, that the fellow whose DNA is on the cigarette butt behind the store, nowhere near the little girls body, is the rapist-murder.