Keypad locks have been a thing for ages. I don't need HomeKit (and the price that goes along with it) to use that. If I want to use a keypad I'll buy a cheaper keypad option.
If locks like this want to be useful, at least in my opinion, they need to offer an easier option that you can't get by paying less. NFC and Bluetooth should both make this more than possible.
Checking your phone or asking Siri if you remembered to lock your door isn't convenient? Kwikset Kevo uses Bluetooth and can be bought on eBay for about $125. It isn't HomeKit compatible, yet, an optional bridge is coming that will talk to it but I'm concerned it won't be HomeKit compatible (I hope I am wrong).