Well sure it’d be unsettling but like… what, are you just going to stop language from changing? Good luck with that. We’re just along for the ride, if people start using it that way, then that’s what it means now. Objecting to that is about as much use as to be pissed into the wind.
If language legitimately changes so a sentence or phrase has two opposite yet universally used meanings, (presumably resolved in each instance by context), it would still be better writing to avoid it when clarity of meaning is paramount.
Encyclopedias are a good place to make as few assumptions and gambles as possible with regard to how a reader might comprehend what is written.
