Though, back in the day my grandpa would solder the piping. And these days they're all press-fit with some kinds of guns. Which aren't tools you have in your garage. I heard it's easy to do. But I rarely see people do it themselves.
I guess with the language, it depends a bit where kind of background people have. I'd agree there is a big difference. Sometimes in legalese, you also have to look up definitions. A word might be defined in a different paragraph. Otherwise it'll get defined by some prior court rulings. Which isn't ideal. Legislative also makes an effort. They'll deliberately choose to make something more vague or more precise, depending on what it's supposed to do. But yeah, it kinda needs to be clear (in theory) because we need people to be able to understand and follow law in the first place. Plus courts shouldn't just do caprice. They should be able to tell what it's supposed to mean.
And you kind of need to be aware of prior rulings, notes by other courts. Especially in common law countries. But also in all the others.
I think it's not fundamentally different to other kinds of specialized jargon. I in computer science also have to deal with words which have special meanings. And weird sounding specifications, because they need to be airtight.