It's a YMMV thing. In this case I think its easier to just pretend a few things happened slightly differently in "Balance of Terror" rather than to twist the meaning in the exact words to better fit the other shows. Each to their own.
Although my opinion has changed since, back when Enterprise was on the air my belief was that the Suliban and Romulans got their cloaking technology from Future Guy, and it was an alteration in the timeline.
The way the lit reconciles the myriad contradictions in canon is one of the things I enjoy about it. It doesn't mean I have to agree with every single solution offered, nor is my disagreement intended as a personal insult to others.