With all due respect, I don't see the difference.
I will take you at your word and assume you're being honest here.
The difference is, if Texas Transplant said what you changed their words to say, which was that the topic was dumb then the topic itself is inherently not worthy of discussion. If one takes Texas Transplant's words as they were written the comment stated that the way you began the topic was dumb...which suggests that it was poorly founded or that by the nature of it's presentation and beginnings will fail to lead to a valuable discussion. The value of the topic itself is not what was stated was dumb but rather the approach to discussing it. So, what Texas Transplant's words addressed was the approach to the topic, you turned that into them making a claim regarding the topic...which they did not.
To clarify something here, I don't know Texas Transplant or have I ever encountered a post of theirs, so I don't know what they believe about the topic itself...that was not what their post addressed.