Personally, I'm just glad criminals are stupid because otherwise they might not get caught.
As a former Probation Officer, I agree. I only got stupid criminals through my office.
Most would not be convicted. Usually, the exculpatory statements made by a suspect trying to wriggle away are more than half the case the prosecution has to prove. Like, “yes, that is my car but I wasn’t driving it.”
I attended a trial where a very skilled defense attorney made the prosecutor spend three days trying to prove that a car with a license plate registered to the defendant was actually his car. The title people would not come to court and the little fact alone made a mess of the entire trial.