Well I do, but I'm just saying that it is annoying to see that word used for something of an entirely different meaning

Sorry I annoyed you, but too bad..? People will say things that annoy/bother you all the time and if you try and correct it all the time then you’re gonna drive yourself crazy. Deal with it.

If it’s a consolation, I actually do understand that gauge is a term generally referring to the thickness of a wire and since plugs and gauges use the same measuring system I thing of plugs as an accurate gauge for gauge.