In theory that would be great, and it's been attempted multiple times throughout history - the law has pretty much always been too complex.
The problem is that much (although admittedly not all) of the complexity in the law is a result of attempts to clarify and provide consistency to the nuance and obscure edge cases that occur in real life. Removing that nuance from codified law results in it being even more down to a judge's individual interpretation than it is today, meaning individuals would be even less clear on where they stand than they do now.
If a computer could accurately interpret the law, and that computer was freely available to everyone, I think we'd all be in a far better position.
The problem is that much (although admittedly not all) of the complexity in the law is a result of attempts to clarify and provide consistency to the nuance and obscure edge cases that occur in real life. Removing that nuance from codified law results in it being even more down to a judge's individual interpretation than it is today, meaning individuals would be even less clear on where they stand than they do now.
If a computer could accurately interpret the law, and that computer was freely available to everyone, I think we'd all be in a far better position.