There is a widespread belief in ADHD and that it should be medicated. That's why millions of children are so medicated. There is institutional belief in that idea as well - that's why so many doctors prescribe these drugs to children. It's not the case that treating ADHD is some minority view that needs to be protected from criticism.
I read your comment as suggesting that I shouldn't share my opinion on the topic because my opinion stigmatizes children who need help. I hope I can highlight the problem with that sentiment by giving an example like if I said you shouldn't share your opinion because the children who are over medicated need help and you are silencing and stigmatizing ideas that would help the over medicated kids.
There is no reason to think my comments are "utterly irresponsible" or "damaging" and you are being hyperbolic by describing them so - any more than your comments are damaging because they encourage over medication. Again, I'd refer you to the "defensive" element of my prior comment. And, since you've mentioned tropes, one trope I'd like to point out is the trope of thinking that "Because I strongly hold belief X I will accuse anyone disagreeing with X of being bad or harmful." You are entitled to your opinions, but not to try and silence people who disagree with you.