USB "defaults" to charge only mode when I plug into my computer, even when the phone is unlocked? (opens in new tab)

It's okay if I have to unlock the phone to use the USB port for file transfer. After all, the phone doesn't "know" if I have anything that's sensitive or I just want to keep private for some reason. However, if I'm unlocking the phone while the USB cable is plugged in, it doesn't even show a...