A will is just another piece of paper until you die. It gives your executor instructions on how to distribute your property after your death. Wills have no force until after your death. Dumping assets on a spouse or a child after your death is like pouring cream through a strainer . . . And try taking your will to another state, where probate laws are different.
Wills are totally nonconfidential.
Write a will. You'd be right. Wills make no provision for you if you become incapacitated. When we're disabled, someone has to take care of us and make our decisions for us, because we can no longer do that ourselves. Wills don't and can't provide for incapacity, and guardianships are very expensive, intrusive, and often humiliating for the ward.