I have not had an iphone come in with a worn lighting port. 10/10 times it has been extremely packed pocket lint preventing the cable from seating correctly.
I've had that problem, but I've also had the cable clips in the sides of the socket lose some of their grip over time. They're spring steel, but even spring steel is still somewhat subject to plastic deformation with enough cycles.
It's never gotten bad enough to be a problem with mine, but I'm still happier to be using magnetic charging cables most of the time. That's primarily for the convenience of it, which is significant, but I don't mind that they also preserve the connector.
(They're especially convenient in the car. I have an SE, but even with a phone that supported inductive charging, I suspect I'd stick with the magnetic-mount-and-cable arrangement - it's exactly as convenient as inductive charging, with no risk of compromise on the strength of the mount in order to get one with half a transformer in it.)
It's never gotten bad enough to be a problem with mine, but I'm still happier to be using magnetic charging cables most of the time. That's primarily for the convenience of it, which is significant, but I don't mind that they also preserve the connector.
(They're especially convenient in the car. I have an SE, but even with a phone that supported inductive charging, I suspect I'd stick with the magnetic-mount-and-cable arrangement - it's exactly as convenient as inductive charging, with no risk of compromise on the strength of the mount in order to get one with half a transformer in it.)