Many people want a networked doorbell. It’s not usually about security, it’s about notification.
For example, if you have a networked doorbell, you can change the notification from a chime to a light if the baby is sleeping.
You can get the notification on your phone or smart watch if you’re working out in the backyard.
You can link the doorbell ringing to other devices, like having the porch light come on.
So like everything else, different people use it for different things.
Personally, I started using the Kuna lantern as a video doorbell, because it combines the camera, a motion triggered light, a two way intercom, and a panic siren. But it doesn’t integrate with smartthings yet.