I'm not sure what aspect of smart locks you don't trust. If it's reliability, most also accept a physical key as a backup. As far as security, I'm under no impression that the firmware is free of vulnerabilities, but any hack is likey to be at least as hard as lockpicking the average lock, which most people can master with a 10 minute YouTube tutorial. If you're a lock nerd and have upgraded all your locks to some Fort Knox style Medeco model, then sure a smart lock will probably be a downgrade, but for the average person I don't think it's substantially worse than what they already have.