Your source is the blog entry of some self-professed 'angry feminist' making up an etymology and then trying to police everyone's language on that basis. People like this are such insufferable know-it-alls.

Example: "autistic".

In recent times, this word is sometimes used as an insult, which seems to me to be somewhat offensive to those with the actual syndrome. However, referring to those who do have the syndrome as medically autistic is obviously not offensive.

This is a more clear-cut example to make the point that misappropriating a word and giving it secondary connotations in certain contexts does not make the word unfit for use in all cases.