Well again first, 0 damage resistance in golden gun. You are the "glass cannon." Its also a risk in that if you miss the shot or even just get a body shot, you aren't putting any damage out. You are risking missing and not putting up any damage. In the case of thundercrash, you have super armor, and you can miss and still put out full damage since you can circle around if you miss it, or just aim for the feet. And then the damage is higher. You are essentially rewarded more for doing something easier. I'll use atheon as an example. Atheon has a very small crit spot and moves, turns, bounces very often and very quickly. It is way harder to hit that crit spot with celestial than it is to just fly straight at him with thundercrash, and you'll still put out less damage if you hit the crit vs damage from falling star. With falling star, you fly straight at him with super armor, get full damage, his boss stop sends you back in the direction you came without killing you due to the armor so you can keep dps up.