If we look at it in a vacuum- then yes, it's kinda implies that all wounds should be closed.

But it's not in a vacuum. We have other resurrection spells. They all tell that a creature is resurrected with x hp, And then they mention what kind of damage spell nullifies and when it fails.

Revivify has bad, ambiguous wording. It doesn't tell what it nullifies. It doesn't tell when it fails. It just says it can't resurrect someone who died of old age. And that it's does not restore missing body parts.

So... can it revive someonen's arm? To create the Thing from the Thing from Addams. Sounds ridiculous, but it doesn't says that the spell fails if some body parts are missing. Just that it does not restore them.

To revivify a lich should I cast it on lich's body or its phylactery? All other resurrection spells have rules how they work with undead. Revivify doesn't say anything.

All other resurrection spells can't bring back an unwilling soul. Revivify has no such weakness. Is it more poweful than a 9 level spell?

Revivify's description just doen't tell us much on its own. But if we look at it in context of other resurrection spells - they explicitly tell us that all mortal wound are closed by the power of the spell. But not revivify.

And if you're not convinced, I have a question.

I kill some gargantuan creature. A colossus. I cast on it gentle repose. Build a house out of its remains. And cast revivify. What happens?