I absolutely disagree.
If you would not want any type of life support withdrawn from you if you were incapacitated, you MUST complete a living will. Otherwise, your family members will be making that decision. They may be under significant pressure from doctors and/or the insurance company to yank your life support. They NEED to have your wishes in writing.
A living will is also important if it is acceptable to you only to withdraw certain types of life support, i.e. a respirator, while other types, i.e. hydration, should not be withdrawn.
A living will is especially important for those who don't want any type of life support (even dialysis), as family members would have a difficult time carrying out such a verbal instruction should you become incapacitated.
In short, I don't see anyone who would not be better off with a living will.
Living will is a sure guarantee of getting substandard medical care.
Your best option is a durable medical power of attorney.
You must discuss your opinions and wishes in depth and they should not have a financial stake in your demise.
You should never get a living will. You need to get a Health Care Power of Attorney to a trusted person that knows what you want to do in certain cases.
Living wills give DOCTORS the power to do what THEY want to do.
Health Care Powers of Attorney give the person YOU PICK the power to do what YOU want them to do for you in case you can’t say so.