This isn't a terribly novel idea. Companies which produce phonebooks have been suing the hell out of municipalities which wish to discontinue the practice of automatically giving a phonebook to their residents for years now. And, by the way, they win those cases. Even in municipalities where they simply want to change receiving a phonebook into an opt-in service, they're suing. That their product actually now goes beyond being worthless directly into the territory of actively destroying value, requiring the munis to put out special dumpsters so that the residents can immediately throw away the useless things, doesn't seem to bother them. They want their money and they don't care how or why they get it.
There was an article about the issue with writing software which does legal things in the Communications of the ACM a year or so ago. I haven't kept up with the topic, but at that time several states had adopted the laws and they were being considered in others. Having lawyers pushing new laws is a pretty easy sell, though, as most legislators come from law in the first place. Some of the states have a nice exemption that just really hammers the intent home - you can run a software service that lets people fill forms, get generated documents, etc... if you pay a lawyer for each thing it does. They don't have to be involved in any way. They don't have to review the documents and put their name on them or anything like that. They just have to get a check. Honestly though, I think that is better than only making it legal for lawyers to use the software. I fear a future where everyone is yolked and herded into a cubicle to sit there and push a single button mindlessly, prodding the automated system to do its thing simply because society and management want people to have to do a job.
> Why does the person putting together my will or litigating a suit for me need to be backed by an organization with an office building, expensive executives, etc?
These exists because they are currently necessary (they are the "tools" you speak of) but they're a pure business cost and constantly under pressure to not exist. Computers have already reduced this back-end cost immensely. For example, lawyers these days all use dictation software rather than having a secretary write out shorthand. If all the tools can be automated, they eventually will.