USB tethering without wifi

I’m guessing here. But I’m assuming that it’s not possible to use USB networking as a reverse tethering for network with Appium, since I don’t want to use wifi. (Android only.)

(I’m wanting to reverse tether in order to create an IP tunnel, I’m not trying to avoid wifi, I’m trying to avoid wifi security issues that are not caused by the wifi infrastructure.) Am I right in assuming Appium won’t help me to reverse tether on Android using the gennymobile gnirehtet tool?