They might be able to go to the law library, but it takes training in order to be able to read and interpret the law properly. The untrained layman simply doesn't have the knowledge to do it.
I can read books on building tall buildings, but does that mean I'm qualified to be the chief engineer for a skyscraper in Manhattan?
I can read all sorts of technical information on the human brain, but does that mean I'm fit to be the head brain surgeon at the largest hospital in the country?
They might be able to go to the law library, but it takes training in order to be able to read and interpret the law properly. ....Like Roe VS Wade for example?
"Interpret the law properly" doesn't explain 10 different interpretations from 10 different lawyers/judges.
The untrained layman simply doesn't have the knowledge to do it.
Don't flatter yourself, we may lack the training but we have the knowledge.