You could say about anything "show me one place where x has value". In such a position, you'd always be able to dispute any point raised.
If you really believe that there is nothing of value in the Tractatus, then you should give a short summary of what you think it is about and why you don't think it has any value.
With such a summary, it's possible to have a debate, since your assertions can be challenged.
I think the problem is that wynand didn't make the original reply to you, he just inserted himself into the debate without saying anything substantial.
You could say about anything "show me one place where x has value". In such a position, you'd always be able to dispute any point raised.
If you really believe that there is nothing of value in the Tractatus, then you should give a short summary of what you think it is about and why you don't think it has any value.
With such a summary, it's possible to have a debate, since your assertions can be challenged.