This is probably one of the biggest disadvantages of bitcoin and I think many of us have the same problem, I cannot give my family direct access to my coins since that will be foolish but in the case something were to happen to me I would like them to use the money I have invested in bitcoin to improve their lives and yet their complete lack of interest on the subject impress me.
like everything else in bitcoin you have the full authority to decide what to do with your bitcoins after you pass away too. this is not a disadvantage but a great advantage. in other circumstances with fiat for instance you would have had to rely on centralized entities such as shady banks, the government, lawyers,... to handle it for you but now you can do it all on yourself.