Every CV rewrite tool does the same thing: it makes the existing bullet points sound more impressive. That is the least useful improvement available, because the person reading has a list of things the role needs and is scanning for whether you have them. Better adjectives on the wrong experience does not move you into the yes pile.
The section that matters here is the third one, and it is uncomfortable by design. It compares the advert's requirements against what your CV actually evidences and names what is missing — but crucially it splits the gaps in two. A thing you have done and never wrote down is fixed in ninety seconds. A thing you have genuinely never done is not fixable today, and knowing which of the two you are looking at is the difference between an afternoon well spent and an afternoon spent rewording.
The instruction against inflating verbs is doing real work too. "Helped with" quietly becoming "led" is the single most common way a rewritten CV turns into a difficult interview.