I too have gone through the sarcasm phase (just another way of expressing anger & hurt as explained by my first therapist), and the cynical phase (just a way to keep people at bay as explained by my first therapist) ...
Neither are healthy coping mechanisms and both only serve to further wound & hurt ourselves & others as well as isolate us and make us forget how to be patient, gentle & kind with one another, and to have a little empathy, compassion & understanding for the pain & suffering that we all have to get ourselves through!
After living in horrid abuses that started early (First rape and sodomy when I was 3 years of age) then near daily rapes, beatings & brutalizations that lasted long (Finally escaped when I was 33.5 years of age), I have a lot of serious wounds to overcome and they are real challenges that I work diligently on every day.
I wouldn't sit here and laugh at or poke fun at a person with a physical disability or challenge, and I certainly don't appreciate others laughing at or poking fun of a person with a mental disability or challenge. It simply is not correct behavior.
It might be okay for the person suffering the disability (and a close friend or support person) to have a good laugh at their own predicament, but for professionals or strangers to do this is not okay at all, and people that don't get that have a more serious problem than the people they're making fun of.
I am proud of the progress I've made, but I know I've still got a long ways to go. I don't need day breakers offering me advice (honest or not), it's often offensive and abusive - whether they get it or understand that or not, that's their issue, not mine, and I don't mind letting them know how I feel about it! Now if they want to be a day maker, then I'm all ears.
And as far as honesty & truth go, it can also be used as a weapon to cause great harm, and often it would have been best left unsaid. My abusers were superb wielders of their weapon of honesty and truth while simultaneously betraying the trust of the child they were committing criminal acts against, so I'm well aware of how honesty and truth can be used to cut a person to their very soul.
So I'm glad I've been able to reduce the amount of sarcasm & cynicism in my life & replaced it with more empathy, compassion & understanding. Of course that doesn't keep me from getting my hackles up when I get triggered by abuse disguised as honesty and truth! Bah!, what BS that line of reasoning is! ... And, I shall continue to fiercely defend that wounded child I once was, because when I'm defending her, I'm also defending others who haven't gotten quite this far in their process.
Now, if you'll excuse me, I'm done here ... I'm going to take my "miserable" self somewhere else and try to be helpful instead of hurtful.
Happy Thanksgiving For Those Who Observe It!
Love, Peace & Giblet Gravy!