The only need I’ve had for one, is covered by the camera connector kit. The kit accommodates either an SD card directly, or for my CF Card camera; USB cable connect.
For any other reason, I’ve not had the need for one.
It was a question that you are reading as a statement. What you want to do with the USB port determines whether there’s an easy alternative, or which one is best for the task
If you need a USB port to read a camera memory card or a flash drive, or to attach a keyboard or MIDI interface, the camera adapter kit provides one. For other purposes, the WiFi or Bluetooth might provide a better alternative.