The USB C port is not the main charging port, the T470s comes with a slim-tip charging-port at the back of the left side. If you order a T470s, you will get it with a slim-tip charger, charging via USB C is optional.
Turns out you're wrong about that, the T470s comes with a USB-C charger by default. At least according to notebookcheck.net:
The Mini-DisplayPort was replaced by a modern USB-C port (Gen.2) including Thunderbolt 3 support with the full 40 Gbps. The port also supports power delivery (2.0) and video output via DisplayPort 1.2a. Our test model is also shipped with a corresponding 65-watt USB-C power adapter. However, the location at the center of the right side is a problem. You cannot use an external mouse on the right side and the cable is annoying here in general – it would have been much better towards the rear.
Thus one has to either order the slim-tip charger as an optional extra or live with the stupendeously braindead position of the laptop's charging port...