Maybe I wasn't clear enough, everything she does, he can react to. She will never hit him even with said combat speed equalized. He doesn't need to dodge at MFTL speed to dodge her strikes, he can dodge at peak human speed to dodge her strikes because he can react to what she does and just dodge them. Nobody is saying he's dodging every strike at MFTL speed, what's being said is he literally TASBot's here, that's the most simple comparison I can think of to get the point across.
Jotaro also holds a 3.4x AP advantage, she might be more skilled, but have fun outskilling someone who you'll never be able to get one over on because everything you do may as well be at a crawl. Again, this is not saying he will punch, kick or even dodge at said speeds, bar once or twice here and there, but what it means is he's basically going at this frame by frame. Ignoring Weekly's inability to understand an analogy, imagine if two characters are in a fighting game, hell let's say we have two Ryu's, both have the same attack speed and combat speed, but one is controlled by a human, and one is reading every input and then reacting to what the other does frame 1, the thing they react with might not be faster than the foe, but the actual "oh they did this, ill do this", is faster. Imagine if Jotaro is just a cheating AI ig in an old SNK game