That’s kind of like saying that ford can’t make a model t anymore.

I’m sure they could, there’s just no reason to.

I’m also sure the contractors that built the Saturn V, those that are still in business, could build equivalent parts today if the government asked.

The Saturn five was an absurdly large rocket designed specifically to get 3 people from earth to the moon. It was insanely expensive per launch, and the only reason it ever flew was because the government was writing nasa blank checks in order to beat the soviets.

Today the government wants a reasonable dollar figure for a launch, and the days of spending a billion dollars per launch are long past.