Reusability is not a bonus like Falcon 9. The whole concept assumes reusability to refuel the lunar lander in Earth orbit since it cannot get to the Moon on its own. It must be refuelled between 10 and 20 times. They won't even say exactly how many times yet. You cannot just yeet that many Starships to get to the Moon once. You must reuse.

Probably not for the price they offered though.

Could they? The Apollo program took 9 years from conception to landing the first person on the moon, and cost $257 billion adjusted for 2020 dollars ($25.4B at the time). For comparison, the Artemis program was budgeted for $86B [0], with less to spend due to NASA budget cuts. The SpaceX Artemis contract is "only" worth $2.9B. Finally, the Starship program has cost an estimated $5-8B so far [1].

Some conclusions / opinions: Starship so far is relatively cheap compared to the previous program that took Americans to the moon. Developing a moon capable rocket takes a long time, especially if they don't just copy the existing designs from 60 years ago. And a single purpose rocket will long-term be more expensive than a more generalised / reusable platform, but that's more capitalist objectives than political (e.g. beating the commies).

[0] https://spacepolicyonline.com/news/nasa-ig-artemis-will-cost...

[1] https://en.wikipedia.org/wiki/SpaceX_Starship