I'm sorry bud, but this is an absolutely ridiculous take.
Russia has been using Iranian Shahed drones to conduct nearly all of their long range drone attacks. In return, Russia has been supplying Iran with Intelligence on the US.
Ukraine didn't just randomly attack a cargo ship. They are effectively preventing Russia from acquiring weapons. Ukraine warned Iran to stop supporting Russia with drones and to not escalate their support. Iran didn't listen.
This has everything to do with defense.