In a good shop, they will pull back and polish the sidewall before they set the side edge angle.
For real shops, with real guys, pulling real files, they will set and polish the base edge angle first, then peel and polish the sidewall, then set and polish the side edge angle.
Any shop that is doing machine only prep is not specifically peeling the sidewall. Meaning that whatever shape the sidewall ends up, it is inline with the edge bevel. When you go to resharpen that edge, the file of stone will be resting on the edge and the sidewall at the same time, generally not allowing you complete access to the edge. Where a peeled sidewall will allow the file to only sharpen or shape the metal side edge.