That does make it sound less good, but there’s also a compelling pro-Ukrainian argument for using revenue (and other funds) rather than the seized assets for defense. It’s widely agreed that Ukraine is owed those assets for reconstruction. Many want to liquidate them as an alternative to directly funding the defense effort, which could harm Ukraine’s ability to rebuild after the war. So it’s sort of robbing future-Ukraine to pay for the present. It’s especially risky because countries tend to lose focus of things like reconstruction and get distracted by the next shiny conflict or crisis.
That obviously depends on Ukraine’s allies continuing to fund their defense though.