I’m not either or.
Clearly, the real target in the Middle East was Iran.
Clearly, the real purpose of going into Iraq was to confront Iran on two fronts.
Clearly, after insurgencies picked up in Afghanistan and Iraq and political resistance grew in Washington, suppressing the insurgencies distracted from the object of crushing Iran to the point that Bush 43 lost his focus and his nerve.
I’m definitely and even back in 2003 was against the second war in Iraq. I seriously believed then and do now that the better option would have been to go into Pakistan and wipe that country off the map. Instead we had two wars in parallel.