If smart guns were not mandated and we would always be able to buy regular guns, I would have no objection to them. They would not be my cup of tea, so I would not buy one. I suspect few people would, if they were voluntary and normal guns were available.
But if my grandmother had wheels, she would be a bicycle.
The fact of the matter is that New Jersey has already mandated that all guns sold in this state must be smart guns within a few years of a smart gun being on the market. Many other states would follow suit. The option would become a mandate almost overnight.