When the facts of a disorder/illness are distorted or unknown, we face judgment from the uneducated, misinformed, and even ourselves, for one.
It exacerbates the depression, anxiety, and low self esteem that often goes hand in hand with chronic illnesses, as well as perpetuating the feeling that we shouldn't talk about it.
If your chronic illness(es) are mental health disorder(s), this is really pervasive and can be extremely detrimental.
Sometimes nothing...some people will feel this way no matter how much we attempt to educate and sway them, and that's the hard part that can discourage us.
Sometimes it's just more self productive to walk away from those toxic people who damage us and try to make us feel at fault.