You don’t have to top your plants, but it does help to control and spread out your canopy, which is nice especially when growing inside. I actually didn’t top at all this year and just used LST and it has been going well. You can just carefully bend that branch over to match the rest of your canopy, and secure it how ever you like. I recommend padded wire ties, wrap them around the stem and carefully bend to make a curved 90 degree angle so the stem doesn’t break. Top and LST is also great.