Me too. Mine (recvd in 1965) says the same thing: it is not intended to ever be used as an I.D. card...
During WWII, my brother and I lived with grandparents from 1942 to 1945...
They constantly told us that the “communist democrats” in control of the government would, one day, use the evil SSN card as a tyrannical control method. ..
They were certainly correct about that, as well as their view that we would always end up in wars with democrats in the WH...