Closing straights of Hormuz is less precise than controlling access to that and Red sea. Exchanging military support for both access to its energy, and others.

Helping Iraq liberate itself from US is key to it replacing its US controlled treasury with new oil revenue. Europe would choose between US and Russian supplies, and so this would be yet another US extortion war vector on Europe.

KSA would still be able to get through Suez, but others wouldn't.