What kind of problems? Well, your family, even your spouse, in most cases, cannot automatically take care of your financial affairs, or make certain medical decisions on your behalf. Many people wrongly assume that family members have authorities and powers that the law doesn’t actually provide.
As discussed above, your spouse cannot sell/refinance your interest in your home (or any real estate) during your illness, even if the title is held in both of your names.
This problem also occurs regarding any other items solely in your name, such as:
Stocks and other investments
Retirement plans
Life insurance
And many others