Think tactical maneuvers.
Iran Regime will not negotiate, that’s a given.
US must appear to offer Iran Regime negotiation option.
During interim, US must not appear to be supporting rebels inside Iran.
When Iran Regime attacks US, and they will, then this Pompeo gesture goes bye-bye.
“Iran Regime will not negotiate, that’s a given”
They might, under the right circumstances. Of course it won’t be sincere.