The person creating a Power of Attorney document can still make his or her own life decisions.
The Power of Attorney (POA) document does not act to delegate all decision-making authority of the person creating the document to another.
Instead, the person executing the document retains all such decision-making authority — including whether or not the document remains in force. (POA authority can be revoked; Standard Legal offers such a revocation document within its package at Standard Legal’s Power of Attorney legal forms software page.)
The POA maker’s own decision-making authority is primary to all others. The POA document merely supplements this decision-making ability by allowing a person named as attorney-in-fact to also make decisions on behalf of the maker on the issues specifically set forth in the document.
(Of course, this all assumes that the maker is of sound mind and that a court has not granted full decision-making authority to another party due to mental incapacity.)