Yes, but they have the incredible advantage that they produce large amounts of energy economically today, whereas, as the article states, it is not yet clear whether fusion will ever be able to produce significant energy, let alone economically.
Both of those are cheap. People advocating nukes wish they were not.
I don't really care whether or not nukes are cheap when they're the only reliable low-carbon energy source we have, and when they're the safest energy source we have. Some things are more fundamentally important than economics.