IOTA currently uses a masternode called the coordinator that verifies all transactions. The coordinator is a necessary feature until there's enough transactions to secure the tangle without out (millions per second?)
This type of sentence is often intellectually dangerous. It's the basic pattern for a false equivalence -- brushing the differences under the rug.
You are essentially saying that risk1 === risk2, without any justification.
The default position when comparing thing1 to thing2, in any complex domain, is that they are not exactly the same, and we should be very cautious when trying to generalize from one to the other.