If you really want to help them though you should understand that, for the people making this argument, probably 99.99% of people in their lives are cis. If 99.99% of travel was done by car, then yes it would be the "normal" way of travel and there'd be no need to distinguish.
Maybe a better example would be EVs? We've never needed to specify an "ICE" car before because they've had dominance. Now though, EVs are becoming more common and all of a sudden what used to be just a "car" is an ICE car. It was always an ICE car but there was never a need to say it because nobody ever had EVs. Well, not anymore! And same for gender.
If you really want to help them though you should understand that, for the people making this argument, probably 99.99% of people in their lives are cis. If 99.99% of travel was done by car, then yes it would be the "normal" way of travel and there'd be no need to distinguish.
Maybe a better example would be EVs? We've never needed to specify an "ICE" car before because they've had dominance. Now though, EVs are becoming more common and all of a sudden what used to be just a "car" is an ICE car. It was always an ICE car but there was never a need to say it because nobody ever had EVs. Well, not anymore! And same for gender.