Sorry, I thought we were considering different theories, not trying to engage in an "I'm right and you're wrong" discussion.
There are a lot of issues where the debate or theories are a good thing. But in this instance we have dozens, if not hundreds, of instances of ships leaving a planet at warp and one instance of someone saying its dangerous. It's like me trying to rationalize and hanging onto "anti-matter destroys the universe" because of The Alternative Factor
yet ignoring that anti-matter is safely used in every other episode. Or trying to rationalize lithium vs. dilithium.
In the real world, the writer simply forgot about all the times a ship left a planet at warp. In universe, the easiest rationalization is that Kira simply doesn't know what she's talking about.