I argue that law is an adversarial profession - what matters is if you are smarter than the lawyer in the other side of the courtroom. If everyone was less good, outcomes would be much the same, and we as a society could redistribute those smart people to engineering problems where those IQ points will make the difference between inventing something useful or not.
It's an effect on the outcome that's orthogonal to the actual facts of the case itself. Unless the guy with a public defender has as much of a chance as the guy with a legal team with a million dollar budget. I'm a little doubtful that that's the case right now.
I'm not sure that the trials of either a wealthy defendant with deep pockets or an indigent defendant with a public defender significantly affect whether the finder of fact can obtain objective Truth with a capital T. The outcomes may indeed be different, but I also think it's orthogonal to the truth as well. They're more the result of the amount of resources you're willing or able to throw at a problem to make it go away.