I have watched several videos on both rocket launches, ballistic missile launches, even a really cool one by Northrup Grumman on launching a nuclear missile.
I understand why missiles have a pitch maneuver. I have watched videos such as (https://www.youtube.com/watch?v=kB-GKvdydho) that state that they roll to cancel out the difference to match its azimuth. But could not a second pitch maneuver actually accomplish as well? The Falcon 9, and Electron don't need to do a roll maneuver, and the Falcon Heavy cannot due to only having 2 boosters attached that have to stay perpendicular to the ground.
Why do non-boosted or basically round rockets, need to do one?