The legal profession is hardly a priesthood. If you're referring to contracts, most of the language is pretty simple. You have to learn a bit of jargon but much less than in software development. I think a lot of people are just intimidated or lazy and don't even try.
Feel free to have a go at this: https://www.congress.gov/bill/119th-congress/house-bill/6028...
It's a critical law currently working its way through congress. It's not only indecipherable, but far longer than the entire original US Constitution. And that's a trend - when things were done by people and for people, they tended to be brief and clear. As lawyers got involved, everything became a convoluted indecipherable mess which may as well be written in Latin.