Well, I'm interested in the product. I imagine others are as well who want to keep a gun at home outside a gun safe but still unusable by an untrained person who might find it. Could be children, could be a colleague rummaging through your desk (with permission), could be the woman who comes every two weeks to clean your house.
There isn't any situation where I'm going to snatch up a gun and want to fire it instantly. I'm simply too afraid of killing the wrong person to do something like that. I'm not a soldier, I'm not a policeman. A fingerprint reader will have plenty of time to reliably match my print because I'm going to take some time before deciding to kill somebody. If I can't take that time, then I guess they are going to kill me.