Paying the price for this mistake

is most likely the next U.S. administration
that initiates wars.
They enjoy the dividends of nationalism and short-term approval ratings,
while the costs of retreat and reconstruction are borne by their successors.
When a scumbag leaves, they can still say I left you with experience.
When Trump leaves, he will also say I won Iran.
Some people only care about emotions in love, not the consequences.
They give emotional value to the max, and shift the real costs elsewhere.