fwiw Sabine has a history of commenting outside of her area of expertise and having some very bad takes.

She's an astrophysicist. Listen to her closely when she's talking about what's going on in space. But her comments on other subjects such as climate, trans rights, and, yes, nuclear energy, should be taken as those of a random interested layperson. Maybe they're right from time to time, but they don't deserve any special consideration.

In that video, for example, she herself admits to ignoring the planning stage, and she's only talking about countries that already have large nuclear industries. Australia has no nuclear expertise to begin with, so it's guaranteed to take a lot longer for us than it does in places like Germany and America. And even then she ends up admitting it's at least twice as expensive as alternative options. She tries to downplay this by making a joke about astrophysics and orders of magnitude, but here on Earth that's a big difference, and that's in the best case.