Well I would argue it has all the same goals and steps of a traditional contract, but automated and electronic. Your points are all valid today...but I recall similar points about e-commerce and e-banking circa 1999. I can hardly be considered a blockchain fanboy (I own precisely 1.0 ETH for experimentation only). But I do sense that the problems you mention can and will be solved by someone or several someones with enough time and money since there are real pain points here. Maybe 5 years, or 15. But I think our kids will find this post in the 2020s in their AR equipped Waymo and laugh at how we did things now.

And the lawyers I know personally love to litigate new things in civil court. Like robbing banks, that's where the money is!