TBH some people might find it hard to get a lawyer, make a will, or pay an agency for planning their stuff when it comes to their crypto. I understand that this solution isn't perfect, because a sneaky family member or a lawyer who knows about crypto could take off with your private key for the bitcoins, and no one else would even know that these crypto assets exist.
You have a point but I disagree with you on the aspect you mentioned that what if a man could not get a lawyer, I don't really no if you meant getting a good lawyer or affording a lawyer, which ever way you meant, I no most lawyer are not trustworthy but there are also good ones that can handle your will very well, so let's not reason it only in one angle, if I most say there are so many people that has family lawyers which they trust very well, most times people are always the cause of there problem choosing a random lawyer whom they don't no too well and a last either the lawyer scam them or tamper with their will and at last we generalize it to all the lawyers forgetting that in most cases we are actually the cause.
In times of willing Bitcoin to our children one could actually open each Bitcoin accounts for each of the children instead of sharing from one centered account because you don't no if some would like to hold there Bitcoin for something there.