My post is not wrong, it comes from being a parent myself and having a nephew who is mentally handicapped. Please take a read @Aurora1 's post as she clearly got exactly what I was sayings! Thank you @Aurora1 for explaining that...I hope more people take into consideration what you wrote...
My nephews teacher told my brother in law the same thing about outbursts. as much of struggle it is, and as a parent, not doing anything to try and correct the problem is worse for the said child. It might be a little more frustrating To deal with, but a parent should never give up on their child and no matter what the circumstances are, should always try to correct said bad behaviors even if it seems impossible.
Every child is different and reacts in different ways to therapy and treatment. My point is its not always simple and quick and what works with one child may not work with another. Please don't make the assumption that these children have meltdowns because parents have not tried anything and everything to prevent them.
My son is 13 now and is verbal and meltdowns are far and few between. He attends regular classes with an aid, and is active in a Boy Scout troop, but none of that changes the fact that he is still autistic, he has just learned coping mechanisms to deal with many things you and I take for granted. And it took years to get him to this point and its still no guarantee that an outburst or meltdown won't occur.
Most parents of autistic children learn fairly quickly what triggers an outburst and learn to avoid those things or work around them.