Exactly. For a ship like this all of the cost is going to be the missiles and radar, the hull is just a neccessary evil you need to get the missiles and radar from A to B. A simple commercial derivative hull would suffice.

I’d rather have a car alarm, double-pane hardened windows and a fire extinguisher in my $100k sports car, should be I ever be able to afford it.
Seems unneccessarily risky to me to forego naval specification structure and damage control features on a ship fitted with $3-4 billion worth of equipment and systems just to save a couple hundred million.
For all the defensive systems and countermeasures it might still suffer a hit, and that would be one almighty write-off if it cannot deal with that. Developments such as electric armour might help, but how much.