I literally made one in the post you quoted.
What you countered with was so vague that no one could tell what you were referring to, specifically, much less challenge you on it.
Also I am under no obligation to "counter" an argument in the first placr if I believe it is to be ridiculous.
You may not be obligated to provide a counter, but, if you're going to say something particularly critical, I think that you should. That's just a good principle to have, IMO, which, after all, is the choice to act a certain way even though you're under no obligation to. In contrast, ridiculing arguments and walking away without really explaining your disagreement because you have that little respect for them seems conceited, immature and a little cowardly, to be perfectly honest. It takes more modesty, maturity and bravery to stand and offer a respectful argument in spite of having strong disagreement and even though someone else may challenge you on it. No, you're under no obligation to act that way, but discussion is better and more enjoyable when people to do that instead of going around putting down others' arguments, IMO.