Gun owners in the US probably wouldn't want their gun to be used against them in a home invasion, or by their child at a school. Seems like that could be a large-ish market. Especially if you can lobby regulators in favor of making it a requirement for all or some people.

You are right that gun owners wouldn't want those things, but they are unlikely to want a smart gun as a solution to those things.

They want the gun to be available to them, and not be under duress to use a fingerprint reader or pin pad or RFID ring to do it.

Responsible gun owners keep guns out of children's hands by locking them up or supervising them, and irresponsible ones aren't going to want to pay extra for smart features.

I think there's a very narrow range of smart features, something like a gun that is unlocked when removed from a holster, but locks up if it is dropped or grabbed, that might be interesting. That makes having the gun taken from an officer less of a threat, which might have an institutional appeal. Give it a 10-hour maintenance mode so that it can be used as a "nightstand gun" while automatically being locked if left idle for longer, and it would basically meet the needs of police both on and off-duty.

In my personal experience gun owners want mechanical foolproofness too. They want something that's not going to lock up or fail or discharge at the wrong time. Smart features just add a layer of complexity with fail possibilities to address a problem that many of them would prefer to be addressed differently anyway.