That already exists. A will is most often in a sealed envelope, and you just need to add to it the keys to your wallet. Lawyers have been handling those kinds of things for decades.
But this is a different space. Do lawyer even know how to deal with bitcoin private keys? how do you know you can trust them? Has this ever been done before?
I would need to see how this actually went down in a real case, I just can't trust people including lawyers.
I agree. A lawyer is a single point of failure. With a decentralized solution that deposited the funds to an account after x number of days of inactivity by the person who signed up for this decentralized service there would be no need to trust a 3rd party (lawyer)