Happy, we have a major failure of communication. I know you to be an honest, knowledgeable person, so it is inconceivable that I could believe that you really think that only guilty or ignorant people accept plea bargains.
On a disturbingly frequent basis, innocent people, not only accept plea bargains in civil and criminal cases, there are tons of examples of 100% guaranteed innocent people that will write out written confessions to a crime, describing how they committed the crime. There are video taped confessions of people saying they committed crimes that it is impossible for them to commit, and these are fully functional "normal" people.
Take this example of a man who has been proven innocent, and yet he was willing to say he committed the crime in order to be released from jail.
https://www.change.org/petitions/par...n-innocent-man
You are saying that he must be ignorant or guilty because he accepted the plea?
There are "ambulance chasers" who will file frivolous lawsuits, knowing full well that there is a low probability of success, and they do it because there are situations where innocent people will settle cases instead of taking the time and money to contest the case. This does not make them "ignorant".