That’s my guess, also.
Blaming Oregon’s fiasco on Oracle is like blaming Ford because some senile old geezer like me drove his Mustang GT down the Interstate Exit Ramp rather than the On Ramp and ended up going the wrong way. Or blame the construction company that build the highway.
Oracle sells database software. How you build your Tables, Relationships & Rules is up to you. Did Oregon hire Oracle to deliver the finished product? If so, who determined what the database was supposed to do? I assume that the Customer (Oregon) has that role.
The state of Oregon did not purchase the Oracle DBMS; they purchased Oracle Consulting Services for design and implementation along with leasing the software.
Did Oregon hire Oracle to deliver the finished product?
Yes.