But you can combat any brain misinterpretations or changes in memory by having multiple witnesses, having the multiple accounts be told one by one and again and again.

No, a group of people getting things wrong is just as unreliable as individuals getting things wrong, especially when malleable memories start synchronizing. This is proven both by decades of scientific studies and centuries of courtroom experience.

Also, this statement is pretty absurd: "...the brain is wired to distort and misinterpret" is an accurate way of expressing that. That implies purpose among other things.

Yes. You need to learn more about this topic. The world is a very complex place and in order for us to maximally survive and reproduce in it, the brain has evolved into an organism that actively distorts, misinterprets and misremembers reality.