I didn't say I used a roller, as a matter of fact I mentioned cheap bristle brushes.
I found that with enough 'wetting' agent the paint flattens to match nicely. Or, with 'dry' brush strokes seems to match texture wise.
One repair at eye level on a wall that gets sideways bright/sun the spot completely can't find! But, I'm STILL fighting underneath that light switch, even after 5 coats!!!