Im not quite sure how to go about addressing this question.
Why the hate of side branches my friend?
If you have the room let them go. Sure you will end up with some popcorn bud.
But you are going to have popcorn bud even if you cut all the side branches off.
Popcorn bud is just bud that hasn't fully formed you are going to have some no matter what.
The only side branches I chop are at the very bottom, usually only the 2 branches closest to the soil.
You do realize that each side branch will get a nice bud on the end right?
The places you will get the most popcorn is between the main stem and the bud on the end of the side branches.
I love the popcorn bud its what I make canna butter and bubble hash out of allong with the sugar trim.