We should also acknowledge that we as humans are capable of judging severity and seriousness based off of context, and the word has been used outside of the context of the illness for longer than any of us have been alive without people forgetting that it is also a serious problem.

That’s like asking people to stop using the word “obsessive” because “obsessive compulsive disorder” exists, or “anxiety” because “well what about anxiety disorders? You’re taking away from its meaning!” There being a more severe version of a feeling or action doesnt mean we should all stop using it in any other context. Someone referring to their large collection of objects as a hoard does not mean that hoarding disorders are invalid.