He has alot of military advisors telling him what would be the outcome of an attack on Iran. I am sure everybody from Mossad & Shin Bet - the airforce and other military advisors are all telling Bibi the facts, he doesn't wake up one morning consult with nobody and order a hit. At the end of the day its unlikely Israel will do anything not least because the US is against it. Both Bibi & the Gulf arab states will all try and lobby the US into bombing Iran. Right now things like long range airforce exercises are for both training purposes and and pressure the west to do something more out of fear Israel willstart dropping bombs on Iran.
Bomb in Lebanon targets bus heading to Syria, no casualties (Reuters)
from the article: IAF chief must save Israel from futile attack on Iran