I think the idea here is if you use the word in its later connotation that belittles someone's medical condition it is wrong. It does not mean the word cannot be used in its actual meaning but sometimes that become taboo also. Using the "R word" for instance, when people use it in its slang form, it is meant to convey "stupid and useless" which is not the definition of the word. Someone with Down's or someone who has a loved one with Down's could be offended by this since they do not view them as stupid and useless. People get upset because it is not appropriate to use words in some contexts but if they were on the other side of it they would see what it really is like to be referred to that way. Having said all that, I think this particular infraction can be a learning opportunity and as much as I don't like Brady, I am not judging him over this.