Interrupting the stretch is the worst. All the topping and lst you basically do to get a good base for the stretch.
So touching/stressing the plant in preflower is the worst time to do it. That’s where she builds up all the size. I wouldn’t touch her, if you want to give better penetration use slight lst or cut single leaves, not good but better than topping or leaving branches completely in the shadows/behind. But even then you have to think: is one branch developed more worths the stress?